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5397 lines
228 KiB
PHP
5397 lines
228 KiB
PHP
<?php
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/**
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* Php.XPath
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*
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* +======================================================================================================+
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* | A php class for searching an XML document using XPath, and making modifications using a DOM
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* | style API. Does not require the DOM XML PHP library.
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* |
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* +======================================================================================================+
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* | What Is XPath:
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* | --------------
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* | - "What SQL is for a relational database, XPath is for an XML document." -- Sam Blum
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* | - "The primary purpose of XPath is to address parts of an XML document. In support of this
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* | primary purpose, it also provides basic facilities for manipulting it." -- W3C
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* |
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* | XPath in action and a very nice intro is under:
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* | http://www.zvon.org/xxl/XPathTutorial/General/examples.html
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* | Specs Can be found under:
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* | http://www.w3.org/TR/xpath W3C XPath Recommendation
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* | http://www.w3.org/TR/xpath20 W3C XPath Recommendation
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* |
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* | NOTE: Most of the XPath-spec has been realized, but not all. Usually this should not be
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* | problem as the missing part is either rarely used or it's simpler to do with PHP itself.
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* +------------------------------------------------------------------------------------------------------+
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* | Requires PHP version 4.0.5 and up
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* +------------------------------------------------------------------------------------------------------+
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* | Main Active Authors:
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* | --------------------
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* | Nigel Swinson <nigelswinson@users.sourceforge.net>
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* | Started around 2001-07, saved phpxml from near death and renamed to Php.XPath
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* | Restructured XPath code to stay in line with XPath spec.
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* | Sam Blum <bs_php@infeer.com>
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* | Started around 2001-09 1st major restruct (V2.0) and testbench initiator.
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* | 2nd (V3.0) major rewrite in 2002-02
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* | Daniel Allen <bigredlinux@yahoo.com>
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* | Started around 2001-10 working to make Php.XPath adhere to specs
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* | Main Former Author: Michael P. Mehl <mpm@phpxml.org>
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* | Inital creator of V 1.0. Stoped activities around 2001-03
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* +------------------------------------------------------------------------------------------------------+
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* | Code Structure:
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* | --------------_
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* | The class is split into 3 main objects. To keep usability easy all 3
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* | objects are in this file (but may be split in 3 file in future).
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* | +-------------+
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* | | XPathBase | XPathBase holds general and debugging functions.
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* | +------+------+
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* | v
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* | +-------------+ XPathEngine is the implementation of the W3C XPath spec. It contains the
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* | | XPathEngine | XML-import (parser), -export and can handle xPathQueries. It's a fully
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* | +------+------+ functional class but has no functions to modify the XML-document (see following).
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* | v
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* | +-------------+
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* | | XPath | XPath extends the functionality with actions to modify the XML-document.
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* | +-------------+ We tryed to implement a DOM - like interface.
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* +------------------------------------------------------------------------------------------------------+
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* | Usage:
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* | ------
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* | Scroll to the end of this php file and you will find a short sample code to get you started
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* +------------------------------------------------------------------------------------------------------+
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* | Glossary:
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* | ---------
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* | To understand how to use the functions and to pass the right parameters, read following:
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* |
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* | Document: (full node tree, XML-tree)
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* | After a XML-source has been imported and parsed, it's stored as a tree of nodes sometimes
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* | refered to as 'document'.
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* |
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* | AbsoluteXPath: (xPath, xPathSet)
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* | A absolute XPath is a string. It 'points' to *one* node in the XML-document. We use the
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* | term 'absolute' to emphasise that it is not an xPath-query (see xPathQuery). A valid xPath
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* | has the form like '/AAA[1]/BBB[2]/CCC[1]'. Usually functions that require a node (see Node)
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* | will also accept an abs. XPath.
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* |
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* | Node: (node, nodeSet, node-tree)
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* | Some funtions require or return a node (or a whole node-tree). Nodes are only used with the
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* | XPath-interface and have an internal structure. Every node in a XML document has a unique
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* | corresponding abs. xPath. That's why public functions that accept a node, will usually also
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* | accept a abs. xPath (a string) 'pointing' to an existing node (see absolutXPath).
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* |
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* | XPathQuery: (xquery, query)
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* | A xPath-query is a string that is matched against the XML-document. The result of the match
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* | is a xPathSet (vector of xPath's). It's always possible to pass a single absoluteXPath
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* | instead of a xPath-query. A valid xPathQuery could look like this:
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* | '//XXX/*[contains(., "foo")]/..' (See the link in 'What Is XPath' to learn more).
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* |
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* |
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* +------------------------------------------------------------------------------------------------------+
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* | Internals:
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* | ----------
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* | - The Node Tree
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* | -------------
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* | A central role of the package is how the XML-data is stored. The whole data is in a node-tree.
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* | A node can be seen as the equvalent to a tag in the XML soure with some extra info.
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* | For instance the following XML
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* | <AAA foo="x">***<BBB/><CCC/>**<BBB/>*</AAA>
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* | Would produce folowing node-tree:
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* | 'super-root' <-- $nodeRoot (Very handy)
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* | |
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* | 'depth' 0 AAA[1] <-- top node. The 'textParts' of this node would be
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* | / | \ 'textParts' => array('***','','**','*')
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* | 'depth' 1 BBB[1] CCC[1] BBB[2] (NOTE: Is always size of child nodes+1)
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* | - The Node
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* | --------
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* | The node itself is an structure desiged mainly to be used in connection with the interface of PHP.XPath.
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* | That means it's possible for functions to return a sub-node-tree that can be used as input of an other
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* | PHP.XPath function.
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* |
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* | The main structure of a node is:
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* | $node = array(
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* | 'name' => '', # The tag name. E.g. In <FOO bar="aaa"/> it would be 'FOO'
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* | 'attributes' => array(), # The attributes of the tag E.g. In <FOO bar="aaa"/> it would be array('bar'=>'aaa')
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* | 'textParts' => array(), # Array of text parts surrounding the children E.g. <FOO>aa<A>bb<B/>cc</A>dd</FOO> -> array('aa','bb','cc','dd')
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* | 'childNodes' => array(), # Array of refences (pointers) to child nodes.
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* |
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* | For optimisation reasions some additional data is stored in the node too:
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* | 'parentNode' => NULL # Reference (pointer) to the parent node (or NULL if it's 'super root')
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* | 'depth' => 0, # The tag depth (or tree level) starting with the root tag at 0.
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* | 'pos' => 0, # Is the zero-based position this node has in the parent's 'childNodes'-list.
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* | 'contextPos' => 1, # Is the one-based position this node has by counting the siblings tags (tags with same name)
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* | 'xpath' => '' # Is the abs. XPath to this node.
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* |
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* | - The NodeIndex
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* | -------------
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* | Every node in the tree has an absolute XPath. E.g '/AAA[1]/BBB[2]' the $nodeIndex is a hash array
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* | to all the nodes in the node-tree. The key used is the absolute XPath (a string).
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* |
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* +------------------------------------------------------------------------------------------------------+
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* | License:
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* | --------
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* | The contents of this file are subject to the Mozilla Public License Version 1.1 (the "License");
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* | you may not use this file except in compliance with the License. You may obtain a copy of the
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* | License at http://www.mozilla.org/MPL/
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* |
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* | Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* | OF ANY KIND, either express or implied. See the License for the specific language governing
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* | rights and limitations under the License.
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* |
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* | The Original Code is <phpXML/>.
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* |
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* | The Initial Developer of the Original Code is Michael P. Mehl. Portions created by Michael
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* | P. Mehl are Copyright (C) 2001 Michael P. Mehl. All Rights Reserved.
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* |
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* | Contributor(s): N.Swinson / S.Blum / D.Allen
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* |
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* | Alternatively, the contents of this file may be used under the terms of either of the GNU
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* | General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public
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* | License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the
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* | LGPL License are applicable instead of those above. If you wish to allow use of your version
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* | of this file only under the terms of the GPL or the LGPL License and not to allow others to
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* | use your version of this file under the MPL, indicate your decision by deleting the
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* | provisions above and replace them with the notice and other provisions required by the
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* | GPL or the LGPL License. If you do not delete the provisions above, a recipient may use
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* | your version of this file under either the MPL, the GPL or the LGPL License.
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* |
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* +======================================================================================================+
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*
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* @author S.Blum / N.Swinson / D.Allen / (P.Mehl)
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* @link http://sourceforge.net/projects/phpxpath/
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* @version 3.2
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* @CVS $Id$
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*/
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/************************************************************************************************
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* ===============================================================================================
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* X P a t h B a s e - Class
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* ===============================================================================================
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************************************************************************************************/
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class XPathBase {
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var $_lastError;
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// As debugging of the xml parse is spread across several functions, we need to make this a member.
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var $bDebugXmlParse = FALSE;
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// Used to help navigate through the begin/end debug calls
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var $iDebugNextLinkNumber = 1;
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var $aDebugOpenLinks = array();
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/**
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* Constructor
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*/
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function XPathBase() {
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# $this->bDebugXmlParse = TRUE;
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$this->properties['verboseLevel'] = 1; // 0=silent, 1 and above produce verbose output (an echo to screen).
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if (!isSet($_ENV)) { // Note: $_ENV introduced in 4.1.0. In earlier versions, use $HTTP_ENV_VARS.
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$_ENV = $GLOBALS['HTTP_ENV_VARS'];
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}
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// Windows 95/98 do not support file locking. Detecting OS (Operation System) and setting the
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// properties['OS_supports_flock'] to FALSE if win 95/98 is detected.
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// This will surpress the file locking error reported from win 98 users when exportToFile() is called.
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// May have to add more OS's to the list in future (Macs?).
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$_ENV['OS'] = isSet($_ENV['OS']) ? $_ENV['OS'] : 'Unknown OS';
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switch ($_ENV['OS']) {
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case 'Windows_95':
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case 'Windows_98':
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case 'Unknown OS':
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$this->properties['OS_supports_flock'] = FALSE;
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break;
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default:
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$this->properties['OS_supports_flock'] = TRUE;
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}
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}
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/**
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* Resets the object so it's able to take a new xml sting/file
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*
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* Constructing objects is slow. If you can, reuse ones that you have used already
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* by using this reset() function.
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*/
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function reset() {
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$this->_lastError = '';
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}
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//-----------------------------------------------------------------------------------------
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// XPathBase ------ Helpers ------
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//-----------------------------------------------------------------------------------------
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/**
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* This method checks the right amount and match of brackets
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*
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* @param $term (string) String in which is checked.
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* @return (bool) TRUE: OK / FALSE: KO
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*/
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function _bracketsCheck($term) {
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$leng = strlen($term);
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$brackets = 0;
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$bracketMisscount = $bracketMissmatsh = FALSE;
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$stack = array();
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for ($i=0; $i<$leng; $i++) {
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switch ($term[$i]) {
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case '(' :
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case '[' :
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$stack[$brackets] = $term[$i];
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$brackets++;
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break;
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case ')':
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$brackets--;
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if ($brackets<0) {
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$bracketMisscount = TRUE;
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break 2;
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}
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if ($stack[$brackets] != '(') {
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$bracketMissmatsh = TRUE;
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break 2;
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}
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break;
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case ']' :
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$brackets--;
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if ($brackets<0) {
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$bracketMisscount = TRUE;
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break 2;
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}
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if ($stack[$brackets] != '[') {
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$bracketMissmatsh = TRUE;
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break 2;
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}
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break;
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}
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}
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// Check whether we had a valid number of brackets.
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if ($brackets != 0) $bracketMisscount = TRUE;
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if ($bracketMisscount || $bracketMissmatsh) {
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Looks for a string within another string -- BUT the search-string must be located *outside* of any brackets.
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*
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* This method looks for a string within another string. Brackets in the
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* string the method is looking through will be respected, which means that
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* only if the string the method is looking for is located outside of
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* brackets, the search will be successful.
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*
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* @param $term (string) String in which the search shall take place.
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* @param $expression (string) String that should be searched.
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* @return (int) This method returns -1 if no string was found,
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* otherwise the offset at which the string was found.
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*/
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function _searchString($term, $expression) {
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$bracketCounter = 0; // Record where we are in the brackets.
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$leng = strlen($term);
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$exprLeng = strlen($expression);
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for ($i=0; $i<$leng; $i++) {
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$char = $term[$i];
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if ($char=='(' || $char=='[') {
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$bracketCounter++;
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continue;
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}
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elseif ($char==')' || $char==']') {
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$bracketCounter--;
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}
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if ($bracketCounter == 0) {
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// Check whether we can find the expression at this index.
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if (substr($term, $i, $exprLeng) == $expression) return $i;
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}
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}
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// Nothing was found.
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return (-1);
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}
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/**
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* Split a string by a searator-string -- BUT the separator-string must be located *outside* of any brackets.
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*
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* Returns an array of strings, each of which is a substring of string formed
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* by splitting it on boundaries formed by the string separator.
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*
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* @param $separator (string) String that should be searched.
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* @param $term (string) String in which the search shall take place.
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* @return (array) see above
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*/
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function _bracketExplode($separator, $term) {
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// Note that it doesn't make sense for $separator to itself contain (,),[ or ],
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// but as this is a private function we should be ok.
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$resultArr = array();
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$bracketCounter = 0; // Record where we are in the brackets.
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do { // BEGIN try block
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// Check if any separator is in the term
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$sepLeng = strlen($separator);
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if (strpos($term, $separator)===FALSE) { // no separator found so end now
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$resultArr[] = $term;
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break; // try-block
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}
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// Make a substitute separator out of 'unused chars'.
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$substituteSep = str_repeat(chr(2), $sepLeng);
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// Now determine the first bracket '(' or '['.
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$tmp1 = strpos($term, '(');
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$tmp2 = strpos($term, '[');
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if ($tmp1===FALSE) {
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$startAt = (int)$tmp2;
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} elseif ($tmp2===FALSE) {
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$startAt = (int)$tmp1;
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} else {
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$startAt = min($tmp1, $tmp2);
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}
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// Get prefix string part before the first bracket.
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$preStr = substr($term, 0, $startAt);
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// Substitute separator in prefix string.
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$preStr = str_replace($separator, $substituteSep, $preStr);
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// Now get the rest-string (postfix string)
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$postStr = substr($term, $startAt);
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// Go all the way through the rest-string.
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$strLeng = strlen($postStr);
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for ($i=0; $i < $strLeng; $i++) {
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$char = $postStr[$i];
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// Spot (,),[,] and modify our bracket counter. Note there is an
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// assumption here that you don't have a string(with[mis)matched]brackets.
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// This should be ok as the dodgy string will be detected elsewhere.
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if ($char=='(' || $char=='[') {
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$bracketCounter++;
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continue;
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}
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elseif ($char==')' || $char==']') {
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$bracketCounter--;
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}
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// If no brackets surround us check for separator
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if ($bracketCounter == 0) {
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// Check whether we can find the expression starting at this index.
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if ((substr($postStr, $i, $sepLeng) == $separator)) {
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// Substitute the found separator
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for ($j=0; $j<$sepLeng; $j++) {
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$postStr[$i+$j] = $substituteSep[$j];
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}
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}
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}
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}
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// Now explod using the substitute separator as key.
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$resultArr = explode($substituteSep, $preStr . $postStr);
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} while (FALSE); // End try block
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// Return the results that we found. May be a array with 1 entry.
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return $resultArr;
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}
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/**
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* Retrieves a substring before a delimiter.
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*
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* This method retrieves everything from a string before a given delimiter,
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* not including the delimiter.
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*
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* @param $string (string) String, from which the substring should be extracted.
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* @param $delimiter (string) String containing the delimiter to use.
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* @return (string) Substring from the original string before the delimiter.
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* @see _afterstr()
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*/
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function _prestr(&$string, $delimiter, $offset=0) {
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// Return the substring.
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$offset = ($offset<0) ? 0 : $offset;
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$pos = strpos($string, $delimiter, $offset);
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if ($pos===FALSE) return $string; else return substr($string, 0, $pos);
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}
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/**
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* Retrieves a substring after a delimiter.
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*
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* This method retrieves everything from a string after a given delimiter,
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* not including the delimiter.
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*
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* @param $string (string) String, from which the substring should be extracted.
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* @param $delimiter (string) String containing the delimiter to use.
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* @return (string) Substring from the original string after the delimiter.
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* @see _prestr()
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*/
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function _afterstr($string, $delimiter, $offset=0) {
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$offset = ($offset<0) ? 0 : $offset;
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// Return the substring.
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return substr($string, strpos($string, $delimiter, $offset) + strlen($delimiter));
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}
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//-----------------------------------------------------------------------------------------
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// XPathBase ------ Debug Stuff ------
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//-----------------------------------------------------------------------------------------
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/**
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* Alter the verbose (error) level reporting.
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*
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* Pass an int. >0 to turn on, 0 to turn off. The higher the number, the
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* higher the level of verbosity. By default, the class has a verbose level
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* of 1.
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*
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* @param $levelOfVerbosity (int) default is 1 = on
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*/
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function setVerbose($levelOfVerbosity = 1) {
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$level = -1;
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if ($levelOfVerbosity === TRUE) {
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$level = 1;
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} elseif ($levelOfVerbosity === FALSE) {
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$level = 0;
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} elseif (is_numeric($levelOfVerbosity)) {
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$level = $levelOfVerbosity;
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}
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if ($level >= 0) $this->properties['verboseLevel'] = $levelOfVerbosity;
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}
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/**
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* Returns the last occured error message.
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*
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* @access public
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* @return string (may be empty if there was no error at all)
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* @see _setLastError(), _lastError
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*/
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function getLastError() {
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return $this->_lastError;
|
|
}
|
|
|
|
/**
|
|
* Creates a textual error message and sets it.
|
|
*
|
|
* example: 'XPath error in THIS_FILE_NAME:LINE. Message: YOUR_MESSAGE';
|
|
*
|
|
* I don't think the message should include any markup because not everyone wants to debug
|
|
* into the browser window.
|
|
*
|
|
* You should call _displayError() rather than _setLastError() if you would like the message,
|
|
* dependant on their verbose settings, echoed to the screen.
|
|
*
|
|
* @param $message (string) a textual error message default is ''
|
|
* @param $line (int) the line number where the error occured, use __LINE__
|
|
* @see getLastError()
|
|
*/
|
|
function _setLastError($message='', $line='-', $file='-') {
|
|
$this->_lastError = 'XPath error in ' . basename($file) . ':' . $line . '. Message: ' . $message;
|
|
}
|
|
|
|
/**
|
|
* Displays an error message.
|
|
*
|
|
* This method displays an error messages depending on the users verbose settings
|
|
* and sets the last error message.
|
|
*
|
|
* If also possibly stops the execution of the script.
|
|
* ### Terminate should not be allowed --fab. Should it?? N.S.
|
|
*
|
|
* @param $message (string) Error message to be displayed.
|
|
* @param $lineNumber (int) line number given by __LINE__
|
|
* @param $terminate (bool) (default TURE) End the execution of this script.
|
|
*/
|
|
function _displayError($message, $lineNumber='-', $file='-', $terminate=TRUE) {
|
|
// Display the error message.
|
|
$err = '<b>XPath error in '.basename($file).':'.$lineNumber.'</b> '.$message."<br \>\n";
|
|
$this->_setLastError($message, $lineNumber, $file);
|
|
if (($this->properties['verboseLevel'] > 0) OR ($terminate)) echo $err;
|
|
// End the execution of this script.
|
|
if ($terminate) exit;
|
|
}
|
|
|
|
/**
|
|
* Displays a diagnostic message
|
|
*
|
|
* This method displays an error messages
|
|
*
|
|
* @param $message (string) Error message to be displayed.
|
|
* @param $lineNumber (int) line number given by __LINE__
|
|
*/
|
|
function _displayMessage($message, $lineNumber='-', $file='-') {
|
|
// Display the error message.
|
|
$err = '<b>XPath message from '.basename($file).':'.$lineNumber.'</b> '.$message."<br \>\n";
|
|
if ($this->properties['verboseLevel'] > 0) echo $err;
|
|
}
|
|
|
|
/**
|
|
* Called to begin the debug run of a function.
|
|
*
|
|
* This method starts a <DIV><PRE> tag so that the entry to this function
|
|
* is clear to the debugging user. Call _closeDebugFunction() at the
|
|
* end of the function to create a clean box round the function call.
|
|
*
|
|
* @author Nigel Swinson <nigelswinson@users.sourceforge.net>
|
|
* @author Sam Blum <bs_php@infeer.com>
|
|
* @param $functionName (string) the name of the function we are beginning to debug
|
|
* @return (array) the output from the microtime() function.
|
|
* @see _closeDebugFunction()
|
|
*/
|
|
function _beginDebugFunction($functionName) {
|
|
$fileName = basename(__FILE__);
|
|
static $color = array('green','blue','red','lime','fuchsia', 'aqua');
|
|
static $colIndex = -1;
|
|
$colIndex++;
|
|
$pre = '<pre STYLE="border:solid thin '. $color[$colIndex % 6] . '; padding:5">';
|
|
$out = '<div align="left"> ' . $pre . "<STRONG>{$fileName} : {$functionName}</STRONG>";
|
|
echo $out;
|
|
echo '<a style="float:right" name="'.$this->iDebugNextLinkNumber.'Open" href="#'.$this->iDebugNextLinkNumber.'Close">Function Close '.$this->iDebugNextLinkNumber.'</a>';
|
|
echo '<hr style="clear:both">';
|
|
array_push($this->aDebugOpenLinks, $this->iDebugNextLinkNumber);
|
|
$this->iDebugNextLinkNumber++;
|
|
return microtime();
|
|
}
|
|
|
|
/**
|
|
* Called to end the debug run of a function.
|
|
*
|
|
* This method ends a <DIV><PRE> block and reports the time since $aStartTime
|
|
* is clear to the debugging user.
|
|
*
|
|
* @author Nigel Swinson <nigelswinson@users.sourceforge.net>
|
|
* @param $aStartTime (array) the time that the function call was started.
|
|
* @param $return_value (mixed) the return value from the function call that
|
|
* we are debugging
|
|
*/
|
|
function _closeDebugFunction($aStartTime, $returnValue = "") {
|
|
echo "<hr>";
|
|
if (isSet($returnValue)) {
|
|
if (is_array($returnValue))
|
|
echo "Return Value: ".print_r($returnValue)."\n";
|
|
else if (is_numeric($returnValue))
|
|
echo "Return Value: '".(string)$returnValue."'\n";
|
|
else if (is_bool($returnValue))
|
|
echo "Return Value: ".($returnValue ? "TRUE" : "FALSE")."\n";
|
|
else
|
|
echo "Return Value: \"".htmlspecialchars($returnValue)."\"\n";
|
|
}
|
|
$this->_profileFunction($aStartTime, "Function took");
|
|
$iOpenLinkNumber = array_pop($this->aDebugOpenLinks);
|
|
echo '<a style="float:right" name="'.$iOpenLinkNumber.'Close" href="#'.$iOpenLinkNumber.'Open">Function Open '.$iOpenLinkNumber.'</a>';
|
|
echo '<br style="clear:both">';
|
|
echo " \n</pre></div>";
|
|
}
|
|
|
|
/**
|
|
* Call to return time since start of function for Profiling
|
|
*
|
|
* @param $aStartTime (array) the time that the function call was started.
|
|
* @param $alertString (string) the string to describe what has just finished happening
|
|
*/
|
|
function _profileFunction($aStartTime, $alertString) {
|
|
// Print the time it took to call this function.
|
|
$now = explode(' ', microtime());
|
|
$last = explode(' ', $aStartTime);
|
|
$delta = (round( (($now[1] - $last[1]) + ($now[0] - $last[0]))*1000 ));
|
|
echo "\n{$alertString} <strong>{$delta} ms</strong>";
|
|
}
|
|
|
|
/**
|
|
* Echo an XPath context for diagnostic purposes
|
|
*
|
|
* @param $context (array) An XPath context
|
|
*/
|
|
function _printContext($context) {
|
|
echo "{$context['nodePath']}({$context['pos']}/{$context['size']})";
|
|
}
|
|
|
|
/**
|
|
* This is a debug helper function. It dumps the node-tree as HTML
|
|
*
|
|
* *QUICK AND DIRTY*. Needs some polishing.
|
|
*
|
|
* @param $node (array) A node
|
|
* @param $indent (string) (optional, default=''). For internal recursive calls.
|
|
*/
|
|
function _treeDump($node, $indent = '') {
|
|
$out = '';
|
|
|
|
// Get rid of recursion
|
|
$parentName = empty($node['parentNode']) ? "SUPER ROOT" : $node['parentNode']['name'];
|
|
unset($node['parentNode']);
|
|
$node['parentNode'] = $parentName ;
|
|
|
|
$out .= "NODE[{$node['name']}]\n";
|
|
|
|
foreach($node as $key => $val) {
|
|
if ($key === 'childNodes') continue;
|
|
if (is_Array($val)) {
|
|
$out .= $indent . " [{$key}]\n" . arrayToStr($val, $indent . ' ');
|
|
} else {
|
|
$out .= $indent . " [{$key}] => '{$val}' \n";
|
|
}
|
|
}
|
|
|
|
if (!empty($node['childNodes'])) {
|
|
$out .= $indent . " ['childNodes'] (Size = ".sizeOf($node['childNodes']).")\n";
|
|
foreach($node['childNodes'] as $key => $childNode) {
|
|
$out .= $indent . " [$key] => " . $this->_treeDump($childNode, $indent . ' ') . "\n";
|
|
}
|
|
}
|
|
|
|
if (empty($indent)) {
|
|
return "<pre>" . htmlspecialchars($out) . "</pre>";
|
|
}
|
|
return $out;
|
|
}
|
|
} // END OF CLASS XPathBase
|
|
|
|
|
|
/************************************************************************************************
|
|
* ===============================================================================================
|
|
* X P a t h E n g i n e - Class
|
|
* ===============================================================================================
|
|
************************************************************************************************/
|
|
|
|
class XPathEngine extends XPathBase {
|
|
|
|
// List of supported XPath axes.
|
|
// What a stupid idea from W3C to take axes name containing a '-' (dash)
|
|
// NOTE: We replace the '-' with '_' to avoid the conflict with the minus operator.
|
|
// We will then do the same on the users Xpath querys
|
|
// -sibling => _sibling
|
|
// -or- => _or_
|
|
//
|
|
// This array contains a list of all valid axes that can be evaluated in an
|
|
// XPath query.
|
|
var $axes = array ( 'ancestor', 'ancestor_or_self', 'attribute', 'child', 'descendant',
|
|
'descendant_or_self', 'following', 'following_sibling',
|
|
'namespace', 'parent', 'preceding', 'preceding_sibling', 'self'
|
|
);
|
|
|
|
// List of supported XPath functions.
|
|
// What a stupid idea from W3C to take function name containing a '-' (dash)
|
|
// NOTE: We replace the '-' with '_' to avoid the conflict with the minus operator.
|
|
// We will then do the same on the users Xpath querys
|
|
// starts-with => starts_with
|
|
// substring-before => substring_before
|
|
// substring-after => substring_after
|
|
// string-length => string_length
|
|
//
|
|
// This array contains a list of all valid functions that can be evaluated
|
|
// in an XPath query.
|
|
var $functions = array ( 'last', 'position', 'count', 'id', 'name',
|
|
'string', 'concat', 'starts_with', 'contains', 'substring_before',
|
|
'substring_after', 'substring', 'string_length', 'normalize_space', 'translate',
|
|
'boolean', 'not', 'true', 'false', 'lang', 'number', 'sum', 'floor',
|
|
'ceiling', 'round' );
|
|
|
|
// List of supported XPath operators.
|
|
//
|
|
// This array contains a list of all valid operators that can be evaluated
|
|
// in a predicate of an XPath query. The list is ordered by the
|
|
// precedence of the operators (lowest precedence first).
|
|
var $operators = array( ' or ', ' and ', '=', '!=', '<=', '<', '>=', '>',
|
|
'+', '-', '*', ' div ', ' mod ', ' | ');
|
|
|
|
// List of literals from the xPath string.
|
|
var $axPathLiterals = array();
|
|
|
|
// The index and tree that is created during the analysis of an XML source.
|
|
var $nodeIndex = array();
|
|
var $nodeRoot = array();
|
|
var $emptyNode = array(
|
|
'name' => '', // The tag name. E.g. In <FOO bar="aaa"/> it would be 'FOO'
|
|
'attributes' => array(), // The attributes of the tag E.g. In <FOO bar="aaa"/> it would be array('bar'=>'aaa')
|
|
'childNodes' => array(), // Array of pointers to child nodes.
|
|
'textParts' => array(), // Array of text parts between the cilderen E.g. <FOO>aa<A>bb<B/>cc</A>dd</FOO> -> array('aa','bb','cc','dd')
|
|
'parentNode' => NULL, // Pointer to parent node or NULL if this node is the 'super root'
|
|
//-- *!* Following vars are set by the indexer and is for optimisation only *!*
|
|
'depth' => 0, // The tag depth (or tree level) starting with the root tag at 0.
|
|
'pos' => 0, // Is the zero-based position this node has in the parents 'childNodes'-list.
|
|
'contextPos' => 1, // Is the one-based position this node has by counting the siblings tags (tags with same name)
|
|
'xpath' => '' // Is the abs. XPath to this node.
|
|
);
|
|
|
|
|
|
// These variable used during the parse XML source
|
|
var $nodeStack = array(); // The elements that we have still to close.
|
|
var $parseStackIndex = 0; // The current element of the nodeStack[] that we are adding to while
|
|
// parsing an XML source. Corresponds to the depth of the xml node.
|
|
// in our input data.
|
|
var $parseOptions = array(); // Used to set the PHP's XML parser options (see xml_parser_set_option)
|
|
var $parsedTextLocation = ''; // A reference to where we have to put char data collected during XML parsing
|
|
var $parsInCData = 0 ; // Is >0 when we are inside a CDATA section.
|
|
var $parseSkipWhiteCache = 0; // A cache of the skip whitespace parse option to speed up the parse.
|
|
|
|
// This is the array of error strings, to keep consistency.
|
|
var $errorStrings = array(
|
|
'AbsoluteXPathRequired' => "The supplied xPath '%s' does not *uniquely* describe a node in the xml document.",
|
|
'NoNodeMatch' => "The supplied xPath-query '%s' does not match *any* node in the xml document."
|
|
);
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* Optionally you may call this constructor with the XML-filename to parse and the
|
|
* XML option vector. Each of the entries in the option vector will be passed to
|
|
* xml_parser_set_option().
|
|
*
|
|
* A option vector sample:
|
|
* $xmlOpt = array(XML_OPTION_CASE_FOLDING => FALSE,
|
|
* XML_OPTION_SKIP_WHITE => TRUE);
|
|
*
|
|
* @param $userXmlOptions (array) (optional) Vector of (<optionID>=><value>,
|
|
* <optionID>=><value>, ...). See PHP's
|
|
* xml_parser_set_option() docu for a list of possible
|
|
* options.
|
|
* @see importFromFile(), importFromString(), setXmlOptions()
|
|
*/
|
|
function XPathEngine($userXmlOptions=array()) {
|
|
parent::XPathBase();
|
|
// Default to not folding case
|
|
$this->parseOptions[XML_OPTION_CASE_FOLDING] = FALSE;
|
|
// And not skipping whitespace
|
|
$this->parseOptions[XML_OPTION_SKIP_WHITE] = FALSE;
|
|
|
|
// Now merge in the overrides.
|
|
// Don't use PHP's array_merge!
|
|
if (is_array($userXmlOptions)) {
|
|
foreach($userXmlOptions as $key => $val) $this->parseOptions[$key] = $val;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Resets the object so it's able to take a new xml sting/file
|
|
*
|
|
* Constructing objects is slow. If you can, reuse ones that you have used already
|
|
* by using this reset() function.
|
|
*/
|
|
function reset() {
|
|
parent::reset();
|
|
$this->properties['xmlFile'] = '';
|
|
$this->parseStackIndex = 0;
|
|
$this->parsedTextLocation = '';
|
|
$this->parsInCData = 0;
|
|
$this->nodeIndex = array();
|
|
$this->nodeRoot = array();
|
|
$this->nodeStack = array();
|
|
$this->aLiterals = array();
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPathEngine ------ Get / Set Stuff ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns the property/ies you want.
|
|
*
|
|
* if $param is not given, all properties will be returned in a hash.
|
|
*
|
|
* @param $param (string) the property you want the value of, or NULL for all the properties
|
|
* @return (mixed) string OR hash of all params, or NULL on an unknown parameter.
|
|
*/
|
|
function getProperties($param=NULL) {
|
|
$this->properties['hasContent'] = !empty($this->nodeRoot);
|
|
$this->properties['caseFolding'] = $this->parseOptions[XML_OPTION_CASE_FOLDING];
|
|
$this->properties['skipWhiteSpaces'] = $this->parseOptions[XML_OPTION_SKIP_WHITE];
|
|
|
|
if (empty($param)) return $this->properties;
|
|
|
|
if (isSet($this->properties[$param])) {
|
|
return $this->properties[$param];
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set an xml_parser_set_option()
|
|
*
|
|
* @param $optionID (int) The option ID (e.g. XML_OPTION_SKIP_WHITE)
|
|
* @param $value (int) The option value.
|
|
* @see XML parser functions in PHP doc
|
|
*/
|
|
function setXmlOption($optionID, $value) {
|
|
if (!is_numeric($optionID)) return;
|
|
$this->parseOptions[$optionID] = $value;
|
|
}
|
|
|
|
/**
|
|
* Sets a number of xml_parser_set_option()s
|
|
*
|
|
* @param $userXmlOptions (array) An array of parser options.
|
|
* @see setXmlOption
|
|
*/
|
|
function setXmlOptions($userXmlOptions=array()) {
|
|
if (!is_array($userXmlOptions)) return;
|
|
foreach($userXmlOptions as $key => $val) {
|
|
$this->setXmlOption($key, $val);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Alternative way to control whether case-folding is enabled for this XML parser.
|
|
*
|
|
* Short cut to setXmlOptions(XML_OPTION_CASE_FOLDING, TRUE/FALSE)
|
|
*
|
|
* When it comes to XML, case-folding simply means uppercasing all tag-
|
|
* and attribute-names (NOT the content) if set to TRUE. Note if you
|
|
* have this option set, then your XPath queries will also be case folded
|
|
* for you.
|
|
*
|
|
* @param $onOff (bool) (default TRUE)
|
|
* @see XML parser functions in PHP doc
|
|
*/
|
|
function setCaseFolding($onOff=TRUE) {
|
|
$this->parseOptions[XML_OPTION_CASE_FOLDING] = $onOff;
|
|
}
|
|
|
|
/**
|
|
* Alternative way to control whether skip-white-spaces is enabled for this XML parser.
|
|
*
|
|
* Short cut to setXmlOptions(XML_OPTION_SKIP_WHITE, TRUE/FALSE)
|
|
*
|
|
* When it comes to XML, skip-white-spaces will trim the tag content.
|
|
* An XML file with no whitespace will be faster to process, but will make
|
|
* your data less human readable when you come to write it out.
|
|
*
|
|
* Running with this option on will slow the class down, so if you want to
|
|
* speed up your XML, then run it through once skipping white-spaces, then
|
|
* write out the new version of your XML without whitespace, then use the
|
|
* new XML file with skip whitespaces turned off.
|
|
*
|
|
* @param $onOff (bool) (default TRUE)
|
|
* @see XML parser functions in PHP doc
|
|
*/
|
|
function setSkipWhiteSpaces($onOff=TRUE) {
|
|
$this->parseOptions[XML_OPTION_SKIP_WHITE] = $onOff;
|
|
}
|
|
|
|
/**
|
|
* Get the node defined by the $absoluteXPath.
|
|
*
|
|
* @param $absoluteXPath (string) (optional, default is 'super-root') xpath to the node.
|
|
* @return (array) The node, or FALSE if the node wasn't found.
|
|
*/
|
|
function &getNode($absoluteXPath='') {
|
|
if ($absoluteXPath==='/') $absoluteXPath = '';
|
|
if (!isSet($this->nodeIndex[$absoluteXPath])) return FALSE;
|
|
return $this->nodeIndex[$absoluteXPath];
|
|
}
|
|
|
|
/**
|
|
* Get a the content of a node text part or node attribute.
|
|
*
|
|
* If the absolute Xpath references an attribute (Xpath ends with @ or attribute::),
|
|
* then the text value of that node-attribute is returned.
|
|
* Otherwise the Xpath is referencing a text part of the node. This can be either a
|
|
* direct reference to a text part (Xpath ends with text()[<nr>]) or indirect reference
|
|
* (a simple abs. Xpath to a node).
|
|
* 1) Direct Reference (xpath ends with text()[<part-number>]):
|
|
* If the 'part-number' is omitted, the first text-part is assumed; starting by 1.
|
|
* Negative numbers are allowed, where -1 is the last text-part a.s.o.
|
|
* 2) Indirect Reference (a simple abs. Xpath to a node):
|
|
* Default is to return the *whole text*; that is the concated text-parts of the matching
|
|
* node. (NOTE that only in this case you'll only get a copy and changes to the returned
|
|
* value wounld have no effect). Optionally you may pass a parameter
|
|
* $textPartNr to define the text-part you want; starting by 1.
|
|
* Negative numbers are allowed, where -1 is the last text-part a.s.o.
|
|
*
|
|
* NOTE I : The returned value can be fetched by reference
|
|
* E.g. $text =& wholeText(). If you wish to modify the text.
|
|
* NOTE II: text-part numbers out of range will return FALSE
|
|
* SIDENOTE:The function name is a suggestion from W3C in the XPath specification level 3.
|
|
*
|
|
* @param $absoluteXPath (string) xpath to the node (See above).
|
|
* @param $textPartNr (int) If referring to a node, specifies which text part
|
|
* to query.
|
|
* @return (&string) A *reference* to the text if the node that the other
|
|
* parameters describe or FALSE if the node is not found.
|
|
*/
|
|
function &wholeText($absoluteXPath, $textPartNr=NULL) {
|
|
$status = FALSE;
|
|
$text = NULL;
|
|
|
|
do { // try-block
|
|
if (preg_match(";(.*)/(attribute::|@)([^/]*)$;U", $absoluteXPath, $matches)) {
|
|
$absoluteXPath = $matches[1];
|
|
$attribute = $matches[3];
|
|
if (!isSet($this->nodeIndex[$absoluteXPath]['attributes'][$attribute])) {
|
|
$this->_displayError("The $absoluteXPath/attribute::$attribute value isn't a node in this document.", __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
$text =& $this->nodeIndex[$absoluteXPath]['attributes'][$attribute];
|
|
$status = TRUE;
|
|
break; // try-block
|
|
}
|
|
|
|
// Xpath contains a 'text()'-function, thus goes right to a text node. If so interpete the Xpath.
|
|
if (preg_match(":(.*)/text\(\)(\[(.*)\])?$:U", $absoluteXPath, $matches)) {
|
|
$absoluteXPath = $matches[1];
|
|
|
|
if (!isSet($this->nodeIndex[$absoluteXPath])) {
|
|
$this->_displayError("The $absoluteXPath value isn't a node in this document.", __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
|
|
// Get the amount of the text parts in the node.
|
|
$textPartSize = sizeOf($this->nodeIndex[$absoluteXPath]['textParts']);
|
|
|
|
// default to the first text node if a text node was not specified
|
|
$textPartNr = isSet($matches[2]) ? substr($matches[2],1,-1) : 1;
|
|
|
|
// Support negative indexes like -1 === last a.s.o.
|
|
if ($textPartNr < 0) $textPartNr = $textPartSize + $textPartNr +1;
|
|
if (($textPartNr <= 0) OR ($textPartNr > $textPartSize)) {
|
|
$this->_displayError("The $absoluteXPath/text()[$textPartNr] value isn't a NODE in this document.", __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
$text =& $this->nodeIndex[$absoluteXPath]['textParts'][$textPartNr - 1];
|
|
$status = TRUE;
|
|
break; // try-block
|
|
}
|
|
|
|
// At this point we have been given an xpath with neither a 'text()' nor 'attribute::' axis at the end
|
|
// So we assume a get to text is wanted and use the optioanl fallback parameters $textPartNr
|
|
|
|
if (!isSet($this->nodeIndex[$absoluteXPath])) {
|
|
$this->_displayError("The $absoluteXPath value isn't a node in this document.", __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
|
|
// Get the amount of the text parts in the node.
|
|
$textPartSize = sizeOf($this->nodeIndex[$absoluteXPath]['textParts']);
|
|
|
|
// If $textPartNr == NULL we return a *copy* of the whole concated text-parts
|
|
if (is_null($textPartNr)) {
|
|
unset($text);
|
|
$text = implode('', $this->nodeIndex[$absoluteXPath]['textParts']);
|
|
$status = TRUE;
|
|
break; // try-block
|
|
}
|
|
|
|
// Support negative indexes like -1 === last a.s.o.
|
|
if ($textPartNr < 0) $textPartNr = $textPartSize + $textPartNr +1;
|
|
if (($textPartNr <= 0) OR ($textPartNr > $textPartSize)) {
|
|
$this->_displayError("The $absoluteXPath has no text part at pos [$textPartNr] (Note: text parts start with 1).", __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
$text =& $this->nodeIndex[$absoluteXPath]['textParts'][$textPartNr -1];
|
|
$status = TRUE;
|
|
} while (FALSE); // END try-block
|
|
|
|
if (!$status) return FALSE;
|
|
return $text;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPathEngine ------ Export the XML Document ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns the containing XML as marked up HTML with specified nodes hi-lighted
|
|
*
|
|
* @param $absoluteXPath (string) The address of the node you would like to export.
|
|
* If empty the whole document will be exported.
|
|
* @param $hilighXpathList (array) A list of nodes that you would like to highlight
|
|
* @return (mixed) The Xml document marked up as HTML so that it can
|
|
* be viewed in a browser, including any XML headers.
|
|
* FALSE on error.
|
|
* @see _export()
|
|
*/
|
|
function exportAsHtml($absoluteXPath='', $hilightXpathList=array()) {
|
|
$htmlString = $this->_export($absoluteXPath, $xmlHeader=NULL, $hilightXpathList);
|
|
if (!$htmlString) return FALSE;
|
|
return "<pre>\n" . $htmlString . "\n</pre>";
|
|
}
|
|
|
|
/**
|
|
* Given a context this function returns the containing XML
|
|
*
|
|
* @param $absoluteXPath (string) The address of the node you would like to export.
|
|
* If empty the whole document will be exported.
|
|
* @param $xmlHeader (array) The string that you would like to appear before
|
|
* the XML content. ie before the <root></root>. If you
|
|
* do not specify this argument, the xmlHeader that was
|
|
* found in the parsed xml file will be used instead.
|
|
* @return (mixed) The Xml fragment/document, suitable for writing
|
|
* out to an .xml file or as part of a larger xml file, or
|
|
* FALSE on error.
|
|
* @see _export()
|
|
*/
|
|
function exportAsXml($absoluteXPath='', $xmlHeader=NULL) {
|
|
$this->hilightXpathList = NULL;
|
|
return $this->_export($absoluteXPath, $xmlHeader);
|
|
}
|
|
|
|
/**
|
|
* Generates a XML string with the content of the current document and writes it to a file.
|
|
*
|
|
* Per default includes a <?xml ...> tag at the start of the data too.
|
|
*
|
|
* @param $fileName (string)
|
|
* @param $absoluteXPath (string) The path to the parent node you want(see text above)
|
|
* @param $xmlHeader (array) The string that you would like to appear before
|
|
* the XML content. ie before the <root></root>. If you
|
|
* do not specify this argument, the xmlHeader that was
|
|
* found in the parsed xml file will be used instead.
|
|
* @return (string) The returned string contains well-formed XML data
|
|
* or FALSE on error.
|
|
* @see exportAsXml(), exportAsHtml()
|
|
*/
|
|
function exportToFile($fileName, $absoluteXPath='', $xmlHeader=NULL) {
|
|
$status = FALSE;
|
|
do { // try-block
|
|
if (!($hFile = fopen($fileName, "wb"))) { // Did we open the file ok?
|
|
$errStr = "Failed to open the $fileName xml file.";
|
|
break; // try-block
|
|
}
|
|
|
|
if ($this->properties['OS_supports_flock']) {
|
|
if (!flock($hFile, LOCK_EX)) { // Lock the file
|
|
$errStr = "Couldn't get an exclusive lock on the $fileName file.";
|
|
break; // try-block
|
|
}
|
|
}
|
|
if (!($xmlOut = $this->_export($absoluteXPath, $xmlHeader))) {
|
|
$errStr = "Export failed";
|
|
break; // try-block
|
|
}
|
|
|
|
if (!fwrite($hFile, $xmlOut)) {
|
|
$errStr = "Write error when writing back the $fileName file.";
|
|
break; // try-block
|
|
}
|
|
|
|
// Flush and unlock the file
|
|
@fflush($hFile);
|
|
$status = TRUE;
|
|
} while(FALSE);
|
|
|
|
@flock($hFile, LOCK_UN);
|
|
@fclose($hFile);
|
|
|
|
if (!$status) $this->_displayError($errStr, __LINE__, __FILE__, FALSE);
|
|
return $status;
|
|
}
|
|
|
|
/**
|
|
* Generates a XML string with the content of the current document.
|
|
*
|
|
* This is the start for extracting the XML-data from the node-tree. We do some preperations
|
|
* and then call _InternalExport() to fetch the main XML-data. You optionally may pass
|
|
* xpath to any node that will then be used as top node, to extract XML-parts of the
|
|
* document. Default is '', meaning to extract the whole document.
|
|
*
|
|
* You also may pass a 'xmlHeader' (usually something like <?xml version="1.0"? > that will
|
|
* overwrite any other 'xmlHeader', if there was one in the original source. If there
|
|
* wasn't one in the original source, and you still don't specify one, then it will
|
|
* use a default of <?xml version="1.0"? >
|
|
* Finaly, when exproting to HTML, you may pass a vector xPaths you want to hi-light.
|
|
* The hi-lighted tags and attributes will receive a nice color.
|
|
*
|
|
* NOTE I : The output can have 2 formats:
|
|
* a) If "skip white spaces" is/was set. (Not Recommended - slower)
|
|
* The output is formatted by adding indenting and carriage returns.
|
|
* b) If "skip white spaces" is/was *NOT* set.
|
|
* 'as is'. No formatting is done. The output should the same as the
|
|
* the original parsed XML source.
|
|
*
|
|
* @param $absoluteXPath (string) (optional, default is root) The node we choose as top-node
|
|
* @param $xmlHeader (string) (optional) content before <root/> (see text above)
|
|
* @param $hilightXpath (array) (optional) a vector of xPaths to nodes we wat to
|
|
* hi-light (see text above)
|
|
* @return (mixed) The xml string, or FALSE on error.
|
|
*/
|
|
function _export($absoluteXPath='', $xmlHeader=NULL, $hilightXpathList='') {
|
|
// Check whether a root node is given.
|
|
if (empty($absoluteXpath)) $absoluteXpath = '';
|
|
if ($absoluteXpath == '/') $absoluteXpath = '';
|
|
if (!isSet($this->nodeIndex[$absoluteXpath])) {
|
|
// If the $absoluteXpath was '' and it didn't exist, then the document is empty
|
|
// and we can safely return ''.
|
|
if ($absoluteXpath == '') return '';
|
|
$this->_displayError("The given xpath '{$absoluteXpath}' isn't a node in this document.", __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
$this->hilightXpathList = $hilightXpathList;
|
|
$this->indentStep = ' ';
|
|
$hilightIsActive = is_array($hilightXpathList);
|
|
if ($hilightIsActive) {
|
|
$this->indentStep = ' ';
|
|
}
|
|
|
|
// Cache this now
|
|
$this->parseSkipWhiteCache = isSet($this->parseOptions[XML_OPTION_SKIP_WHITE]) ? $this->parseOptions[XML_OPTION_SKIP_WHITE] : FALSE;
|
|
|
|
///////////////////////////////////////
|
|
// Get the starting node and begin with the header
|
|
|
|
// Get the start node. The super root is a special case.
|
|
$startNode = NULL;
|
|
if (empty($absoluteXPath)) {
|
|
$superRoot = $this->nodeIndex[''];
|
|
// If they didn't specify an xml header, use the one in the object
|
|
if (is_null($xmlHeader)) {
|
|
$xmlHeader = $this->parseSkipWhiteCache ? trim($superRoot['textParts'][0]) : $superRoot['textParts'][0];
|
|
}
|
|
// If we still don't have an XML header, then use a suitable default
|
|
if (empty($xmlHeader)) {
|
|
$xmlHeader = '<?xml version="1.0"?>';
|
|
}
|
|
|
|
if (isSet($superRoot['childNodes'][0])) $startNode = $superRoot['childNodes'][0];
|
|
} else {
|
|
$startNode = $this->nodeIndex[$absoluteXPath];
|
|
}
|
|
|
|
if (!empty($xmlHeader)) {
|
|
$xmlOut = $this->parseSkipWhiteCache ? $xmlHeader."\n" : $xmlHeader;
|
|
} else {
|
|
$xmlOut = '';
|
|
}
|
|
|
|
///////////////////////////////////////
|
|
// Output the document.
|
|
|
|
if (($xmlOut .= $this->_InternalExport($startNode)) === FALSE) {
|
|
return FALSE;
|
|
}
|
|
|
|
///////////////////////////////////////
|
|
|
|
// Convert our markers to hi-lights.
|
|
if ($hilightIsActive) {
|
|
$from = array('<', '>', chr(2), chr(3));
|
|
$to = array('<', '>', '<font color="#FF0000"><b>', '</b></font>');
|
|
$xmlOut = str_replace($from, $to, $xmlOut);
|
|
}
|
|
return $xmlOut;
|
|
}
|
|
|
|
/**
|
|
* Export the xml document starting at the named node.
|
|
*
|
|
* @param $node (node) The node we have to start exporting from
|
|
* @return (string) The string representation of the node.
|
|
*/
|
|
function _InternalExport($node) {
|
|
$bDebugThisFunction = FALSE;
|
|
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("_InternalExport");
|
|
echo "Exporting node: ".$node['xpath']."<br>\n";
|
|
}
|
|
|
|
////////////////////////////////
|
|
|
|
// Quick out.
|
|
if (empty($node)) return '';
|
|
|
|
// The output starts as empty.
|
|
$xmlOut = '';
|
|
// This loop will output the text before the current child of a parent then the
|
|
// current child. Where the child is a short tag we output the child, then move
|
|
// onto the next child. Where the child is not a short tag, we output the open tag,
|
|
// then queue up on currentParentStack[] the child.
|
|
//
|
|
// When we run out of children, we then output the last text part, and close the
|
|
// 'parent' tag before popping the stack and carrying on.
|
|
//
|
|
// To illustrate, the numbers in this xml file indicate what is output on each
|
|
// pass of the while loop:
|
|
//
|
|
// 1
|
|
// <1>2
|
|
// <2>3
|
|
// <3/>4
|
|
// </4>5
|
|
// <5/>6
|
|
// </6>
|
|
|
|
// Although this is neater done using recursion, there's a 33% performance saving
|
|
// to be gained by using this stack mechanism.
|
|
|
|
// Only add CR's if "skip white spaces" was set. Otherwise leave as is.
|
|
$CR = ($this->parseSkipWhiteCache) ? "\n" : '';
|
|
$currentIndent = '';
|
|
$hilightIsActive = is_array($this->hilightXpathList);
|
|
|
|
// To keep track of where we are in the document we use a node stack. The node
|
|
// stack has the following parallel entries:
|
|
// 'Parent' => (array) A copy of the parent node that who's children we are
|
|
// exporting
|
|
// 'ChildIndex' => (array) The child index of the corresponding parent that we
|
|
// are currently exporting.
|
|
// 'Highlighted'=> (bool) If we are highlighting this node. Only relevant if
|
|
// the hilight is active.
|
|
|
|
// Setup our node stack. The loop is designed to output children of a parent,
|
|
// not the parent itself, so we must put the parent on as the starting point.
|
|
$nodeStack['Parent'] = array($node['parentNode']);
|
|
// And add the childpos of our node in it's parent to our "child index stack".
|
|
$nodeStack['ChildIndex'] = array($node['pos']);
|
|
// We start at 0.
|
|
$nodeStackIndex = 0;
|
|
|
|
// We have not to output text before/after our node, so blank it. We will recover it
|
|
// later
|
|
$OldPreceedingStringValue = $nodeStack['Parent'][0]['textParts'][$node['pos']];
|
|
$OldPreceedingStringRef =& $nodeStack['Parent'][0]['textParts'][$node['pos']];
|
|
$OldPreceedingStringRef = "";
|
|
$currentXpath = "";
|
|
|
|
// While we still have data on our stack
|
|
while ($nodeStackIndex >= 0) {
|
|
// Count the children and get a copy of the current child.
|
|
$iChildCount = count($nodeStack['Parent'][$nodeStackIndex]['childNodes']);
|
|
$currentChild = $nodeStack['ChildIndex'][$nodeStackIndex];
|
|
// Only do the auto indenting if the $parseSkipWhiteCache flag was set.
|
|
if ($this->parseSkipWhiteCache)
|
|
$currentIndent = str_repeat($this->indentStep, $nodeStackIndex);
|
|
|
|
if ($bDebugThisFunction)
|
|
echo "Exporting child ".($currentChild+1)." of node {$nodeStack['Parent'][$nodeStackIndex]['xpath']}\n";
|
|
|
|
///////////////////////////////////////////
|
|
// Add the text before our child.
|
|
|
|
// Add the text part before the current child
|
|
$tmpTxt =& $nodeStack['Parent'][$nodeStackIndex]['textParts'][$currentChild];
|
|
if (isSet($tmpTxt) AND ($tmpTxt!="")) {
|
|
// Only add CR indent if there were children
|
|
if ($iChildCount)
|
|
$xmlOut .= $CR.$currentIndent;
|
|
// Hilight if necessary.
|
|
$highlightStart = $highlightEnd = '';
|
|
if ($hilightIsActive) {
|
|
$currentXpath = $nodeStack['Parent'][$nodeStackIndex]['xpath'].'/text()['.($currentChild+1).']';
|
|
if (in_array($currentXpath, $this->hilightXpathList)) {
|
|
// Yes we hilight
|
|
$highlightStart = chr(2);
|
|
$highlightEnd = chr(3);
|
|
}
|
|
}
|
|
$xmlOut .= $highlightStart.$nodeStack['Parent'][$nodeStackIndex]['textParts'][$currentChild].$highlightEnd;
|
|
}
|
|
if ($iChildCount && $nodeStackIndex) $xmlOut .= $CR;
|
|
|
|
///////////////////////////////////////////
|
|
|
|
// Are there any more children?
|
|
if ($iChildCount <= $currentChild) {
|
|
// Nope, so output the last text before the closing tag
|
|
$tmpTxt =& $nodeStack['Parent'][$nodeStackIndex]['textParts'][$currentChild+1];
|
|
if (isSet($tmpTxt) AND ($tmpTxt!="")) {
|
|
// Hilight if necessary.
|
|
$highlightStart = $highlightEnd = '';
|
|
if ($hilightIsActive) {
|
|
$currentXpath = $nodeStack['Parent'][$nodeStackIndex]['xpath'].'/text()['.($currentChild+2).']';
|
|
if (in_array($currentXpath, $this->hilightXpathList)) {
|
|
// Yes we hilight
|
|
$highlightStart = chr(2);
|
|
$highlightEnd = chr(3);
|
|
}
|
|
}
|
|
$xmlOut .= $highlightStart
|
|
.$currentIndent.$nodeStack['Parent'][$nodeStackIndex]['textParts'][$currentChild+1].$CR
|
|
.$highlightEnd;
|
|
}
|
|
|
|
// Now close this tag, as we are finished with this child.
|
|
|
|
// Potentially output an (slightly smaller indent).
|
|
if ($this->parseSkipWhiteCache
|
|
&& count($nodeStack['Parent'][$nodeStackIndex]['childNodes'])) {
|
|
$xmlOut .= str_repeat($this->indentStep, $nodeStackIndex - 1);
|
|
}
|
|
|
|
// Check whether the xml-tag is to be hilighted.
|
|
$highlightStart = $highlightEnd = '';
|
|
if ($hilightIsActive) {
|
|
$currentXpath = $nodeStack['Parent'][$nodeStackIndex]['xpath'];
|
|
if (in_array($currentXpath, $this->hilightXpathList)) {
|
|
// Yes we hilight
|
|
$highlightStart = chr(2);
|
|
$highlightEnd = chr(3);
|
|
}
|
|
}
|
|
$xmlOut .= $highlightStart
|
|
.'</'.$nodeStack['Parent'][$nodeStackIndex]['name'].'>'
|
|
.$highlightEnd;
|
|
// Decrement the $nodeStackIndex to go back to the next unfinished parent.
|
|
$nodeStackIndex--;
|
|
|
|
// If the index is 0 we are finished exporting the last node, as we may have been
|
|
// exporting an internal node.
|
|
if ($nodeStackIndex == 0) break;
|
|
|
|
// Indicate to the parent that we are finished with this child.
|
|
$nodeStack['ChildIndex'][$nodeStackIndex]++;
|
|
|
|
continue;
|
|
}
|
|
|
|
///////////////////////////////////////////
|
|
// Ok, there are children still to process.
|
|
|
|
// Queue up the next child (I can copy because I won't modify and copying is faster.)
|
|
$nodeStack['Parent'][$nodeStackIndex + 1] = $nodeStack['Parent'][$nodeStackIndex]['childNodes'][$currentChild];
|
|
|
|
// Work out if it is a short child tag.
|
|
$iGrandChildCount = count($nodeStack['Parent'][$nodeStackIndex + 1]['childNodes']);
|
|
$shortGrandChild = (($iGrandChildCount == 0) AND (implode('',$nodeStack['Parent'][$nodeStackIndex + 1]['textParts'])==''));
|
|
|
|
///////////////////////////////////////////
|
|
// Assemble the attribute string first.
|
|
$attrStr = '';
|
|
foreach($nodeStack['Parent'][$nodeStackIndex + 1]['attributes'] as $key=>$val) {
|
|
// Should we hilight the attribute?
|
|
if ($hilightIsActive AND in_array($currentXpath.'/attribute::'.$key, $this->hilightXpathList)) {
|
|
$hiAttrStart = chr(2);
|
|
$hiAttrEnd = chr(3);
|
|
} else {
|
|
$hiAttrStart = $hiAttrEnd = '';
|
|
}
|
|
$attrStr .= ' '.$hiAttrStart.$key.'="'.$val.'"'.$hiAttrEnd;
|
|
}
|
|
|
|
///////////////////////////////////////////
|
|
// Work out what goes before and after the tag content
|
|
|
|
$beforeTagContent = $currentIndent;
|
|
if ($shortGrandChild) $afterTagContent = '/>';
|
|
else $afterTagContent = '>';
|
|
|
|
// Check whether the xml-tag is to be hilighted.
|
|
if ($hilightIsActive) {
|
|
$currentXpath = $nodeStack['Parent'][$nodeStackIndex + 1]['xpath'];
|
|
if (in_array($currentXpath, $this->hilightXpathList)) {
|
|
// Yes we hilight
|
|
$beforeTagContent .= chr(2);
|
|
$afterTagContent .= chr(3);
|
|
}
|
|
}
|
|
$beforeTagContent .= '<';
|
|
// if ($shortGrandChild) $afterTagContent .= $CR;
|
|
|
|
///////////////////////////////////////////
|
|
// Output the tag
|
|
|
|
$xmlOut .= $beforeTagContent
|
|
.$nodeStack['Parent'][$nodeStackIndex + 1]['name'].$attrStr
|
|
.$afterTagContent;
|
|
|
|
///////////////////////////////////////////
|
|
// Carry on.
|
|
|
|
// If it is a short tag, then we've already done this child, we just move to the next
|
|
if ($shortGrandChild) {
|
|
// Move to the next child, we need not go deeper in the tree.
|
|
$nodeStack['ChildIndex'][$nodeStackIndex]++;
|
|
// But if we are just exporting the one node we'd go no further.
|
|
if ($nodeStackIndex == 0) break;
|
|
} else {
|
|
// Else queue up the child going one deeper in the stack
|
|
$nodeStackIndex++;
|
|
// Start with it's first child
|
|
$nodeStack['ChildIndex'][$nodeStackIndex] = 0;
|
|
}
|
|
}
|
|
|
|
$result = $xmlOut;
|
|
|
|
// Repair what we "undid"
|
|
$OldPreceedingStringRef = $OldPreceedingStringValue;
|
|
|
|
////////////////////////////////////////////
|
|
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $result);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPathEngine ------ Import the XML Source ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Reads a file or URL and parses the XML data.
|
|
*
|
|
* Parse the XML source and (upon success) store the information into an internal structure.
|
|
*
|
|
* @param $fileName (string) Path and name (or URL) of the file to be read and parsed.
|
|
* @return (bool) TRUE on success, FALSE on failure (check getLastError())
|
|
* @see importFromString(), getLastError(),
|
|
*/
|
|
function importFromFile($fileName) {
|
|
$status = FALSE;
|
|
$errStr = '';
|
|
do { // try-block
|
|
// Remember file name. Used in error output to know in which file it happend
|
|
$this->properties['xmlFile'] = $fileName;
|
|
// If we already have content, then complain.
|
|
if (!empty($this->nodeRoot)) {
|
|
$errStr = 'Called when this object already contains xml data. Use reset().';
|
|
break; // try-block
|
|
}
|
|
// The the source is an url try to fetch it.
|
|
if (preg_match(';^http(s)?://;', $fileName)) {
|
|
// Read the content of the url...this is really prone to errors, and we don't really
|
|
// check for too many here...for now, suppressing both possible warnings...we need
|
|
// to check if we get a none xml page or something of that nature in the future
|
|
$xmlString = @implode('', @file($fileName));
|
|
if (!empty($xmlString)) {
|
|
$status = TRUE;
|
|
} else {
|
|
$errStr = "The url '{$fileName}' could not be found or read.";
|
|
}
|
|
break; // try-block
|
|
}
|
|
|
|
// Reaching this point we're dealing with a real file (not an url). Check if the file exists and is readable.
|
|
if (!is_readable($fileName)) { // Read the content from the file
|
|
$errStr = "File '{$fileName}' could not be found or read.";
|
|
break; // try-block
|
|
}
|
|
if (is_dir($fileName)) {
|
|
$errStr = "'{$fileName}' is a directory.";
|
|
break; // try-block
|
|
}
|
|
// Read the file
|
|
if (!($fp = @fopen($fileName, 'rb'))) {
|
|
$errStr = "Failed to open '{$fileName}' for read.";
|
|
break; // try-block
|
|
}
|
|
$xmlString = fread ($fp, filesize($fileName));
|
|
@fclose($fp);
|
|
|
|
$status = TRUE;
|
|
} while (FALSE);
|
|
|
|
if (!$status) {
|
|
$this->_displayError('In importFromFile(): '. $errStr, __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
return $this->importFromString($xmlString);
|
|
}
|
|
|
|
/**
|
|
* Reads a string and parses the XML data.
|
|
*
|
|
* Parse the XML source and (upon success) store the information into an internal structure.
|
|
* If a parent xpath is given this means that XML data is to be *appended* to that parent.
|
|
*
|
|
* ### If a function uses setLastError(), then say in the function header that getLastError() is useful.
|
|
*
|
|
* @param $xmlString (string) Name of the string to be read and parsed.
|
|
* @param $absoluteParentPath (string) Node to append data too (see above)
|
|
* @return (bool) TRUE on success, FALSE on failure
|
|
* (check getLastError())
|
|
*/
|
|
function importFromString($xmlString, $absoluteParentPath = '') {
|
|
$bDebugThisFunction = FALSE;
|
|
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("importFromString");
|
|
echo "Importing from string of length ".strlen($xmlString)." to node '$absoluteParentPath'\n<br>";
|
|
echo "Parser options:\n<br>";
|
|
print_r($this->parseOptions);
|
|
}
|
|
|
|
$status = FALSE;
|
|
$errStr = '';
|
|
do { // try-block
|
|
// If we already have content, then complain.
|
|
if (!empty($this->nodeRoot) AND empty($absoluteParentPath)) {
|
|
$errStr = 'Called when this object already contains xml data. Use reset() or pass the parent Xpath as 2ed param to where tie data will append.';
|
|
break; // try-block
|
|
}
|
|
// Check whether content has been read.
|
|
if (empty($xmlString)) {
|
|
// Nothing to do!!
|
|
$status = TRUE;
|
|
// If we were importing to root, build a blank root.
|
|
if (empty($absoluteParentPath)) {
|
|
$this->nodeRoot = array();
|
|
}
|
|
$this->reindexNodeTree();
|
|
// $errStr = 'This xml document (string) was empty';
|
|
break; // try-block
|
|
} else {
|
|
$xmlString = $this->_translateAmpersand($xmlString);
|
|
}
|
|
|
|
// Restart our node index with a root entry.
|
|
$nodeStack = array();
|
|
$this->parseStackIndex = 0;
|
|
|
|
// If a parent xpath is given this means that XML data is to be *appended* to that parent.
|
|
if (!empty($absoluteParentPath)) {
|
|
// Check if parent exists
|
|
if (!isSet($nodeIndex[$absoluteParentPath])) {
|
|
$errStr = "You tried to append XML data to a parent '$absoluteParentPath' that does not exist.";
|
|
break; // try-block
|
|
}
|
|
// Add it as the starting point in our array.
|
|
$this->nodeStack[0] =& $nodeIndex[$absoluteParentPath];
|
|
} else {
|
|
// Build a 'super-root'
|
|
$this->nodeRoot = $this->emptyNode;
|
|
$this->nodeRoot['name'] = '';
|
|
$this->nodeRoot['parentNode'] = NULL;
|
|
// Put it in as the start of our node stack.
|
|
$this->nodeStack[0] =& $this->nodeRoot;
|
|
}
|
|
|
|
// Point our text buffer reference at the next text part of the root
|
|
$this->parsedTextLocation =& $this->nodeStack[0]['textParts'][];
|
|
$this->parsInCData = 0;
|
|
// We cache this now.
|
|
$this->parseSkipWhiteCache = isSet($this->parseOptions[XML_OPTION_SKIP_WHITE]) ? $this->parseOptions[XML_OPTION_SKIP_WHITE] : FALSE;
|
|
|
|
// Create an XML parser.
|
|
$parser = xml_parser_create();
|
|
// Set default XML parser options.
|
|
if (is_array($this->parseOptions)) {
|
|
foreach($this->parseOptions as $key => $val) {
|
|
xml_parser_set_option($parser, $key, $val);
|
|
}
|
|
}
|
|
|
|
// Set the object and the element handlers for the XML parser.
|
|
xml_set_object($parser, &$this);
|
|
xml_set_element_handler($parser, '_handleStartElement', '_handleEndElement');
|
|
xml_set_character_data_handler($parser, '_handleCharacterData');
|
|
xml_set_default_handler($parser, '_handleDefaultData');
|
|
xml_set_processing_instruction_handler($parser, '_handlePI');
|
|
|
|
if ($bDebugThisFunction)
|
|
$this->_profileFunction($aStartTime, "Setup for parse");
|
|
|
|
// Parse the XML source and on error generate an error message.
|
|
if (!xml_parse($parser, $xmlString, TRUE)) {
|
|
$source = empty($this->properties['xmlFile']) ? 'string' : 'file ' . basename($this->properties['xmlFile']) . "'";
|
|
$errStr = "XML error in given {$source} on line ".
|
|
xml_get_current_line_number($parser). ' column '. xml_get_current_column_number($parser) .
|
|
'. Reason:'. xml_error_string(xml_get_error_code($parser));
|
|
break; // try-block
|
|
}
|
|
|
|
// Free the parser.
|
|
@xml_parser_free($parser);
|
|
// And we don't need this any more.
|
|
$this->nodeStack = array();
|
|
|
|
if ($bDebugThisFunction)
|
|
$this->_profileFunction($aStartTime, "Parse Object");
|
|
|
|
$this->reindexNodeTree();
|
|
|
|
if ($bDebugThisFunction) {
|
|
print_r(array_keys($this->nodeIndex));
|
|
}
|
|
|
|
if ($bDebugThisFunction)
|
|
$this->_profileFunction($aStartTime, "Reindex Object");
|
|
|
|
$status = TRUE;
|
|
} while (FALSE);
|
|
|
|
if (!$status) {
|
|
$this->_displayError('In importFromString(): '. $errStr, __LINE__, __FILE__, FALSE);
|
|
$bResult = FALSE;
|
|
} else {
|
|
$bResult = TRUE;
|
|
}
|
|
|
|
////////////////////////////////////////////
|
|
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $bResult);
|
|
}
|
|
|
|
return $bResult;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPathEngine ------ XML Handlers ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Handles opening XML tags while parsing.
|
|
*
|
|
* While parsing a XML document for each opening tag this method is
|
|
* called. It'll add the tag found to the tree of document nodes.
|
|
*
|
|
* @param $parser (int) Handler for accessing the current XML parser.
|
|
* @param $name (string) Name of the opening tag found in the document.
|
|
* @param $attributes (array) Associative array containing a list of
|
|
* all attributes of the tag found in the document.
|
|
* @see _handleEndElement(), _handleCharacterData()
|
|
*/
|
|
function _handleStartElement($parser, $nodeName, $attributes) {
|
|
if (empty($nodeName)) {
|
|
$this->_displayError('XML error in file at line'. xml_get_current_line_number($parser) .'. Empty name.', __LINE__, __FILE__);
|
|
return;
|
|
}
|
|
|
|
// Trim accumulated text if necessary.
|
|
if ($this->parseSkipWhiteCache) {
|
|
$iCount = count($this->nodeStack[$this->parseStackIndex]['textParts']);
|
|
$this->nodeStack[$this->parseStackIndex]['textParts'][$iCount-1] = rtrim($this->parsedTextLocation);
|
|
}
|
|
|
|
if ($this->bDebugXmlParse) {
|
|
echo "<blockquote>" . htmlspecialchars("Start node: <".$nodeName . ">")."<br>";
|
|
echo "Appended to stack entry: $this->parseStackIndex<br>\n";
|
|
echo "Text part before element is: ".htmlspecialchars($this->parsedTextLocation);
|
|
/*
|
|
echo "<pre>";
|
|
$dataPartsCount = count($this->nodeStack[$this->parseStackIndex]['textParts']);
|
|
for ($i = 0; $i < $dataPartsCount; $i++) {
|
|
echo "$i:". htmlspecialchars($this->nodeStack[$this->parseStackIndex]['textParts'][$i])."\n";
|
|
}
|
|
echo "</pre>";
|
|
*/
|
|
}
|
|
|
|
// Add a node and set path to current.
|
|
if (!$this->_internalAppendChild($this->parseStackIndex, $nodeName)) {
|
|
$this->_displayError('Internal error during parse of XML file at line'. xml_get_current_line_number($parser) .'. Empty name.', __LINE__, __FILE__);
|
|
return;
|
|
}
|
|
|
|
// We will have gone one deeper then in the stack.
|
|
$this->parseStackIndex++;
|
|
|
|
// Point our parseTxtBuffer reference at the new node.
|
|
$this->parsedTextLocation =& $this->nodeStack[$this->parseStackIndex]['textParts'][0];
|
|
|
|
// Set the attributes.
|
|
if (!empty($attributes)) {
|
|
if ($this->bDebugXmlParse) {
|
|
echo 'Attributes: <br>';
|
|
print_r($attributes);
|
|
echo '<br>';
|
|
}
|
|
$this->nodeStack[$this->parseStackIndex]['attributes'] = $attributes;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles closing XML tags while parsing.
|
|
*
|
|
* While parsing a XML document for each closing tag this method is called.
|
|
*
|
|
* @param $parser (int) Handler for accessing the current XML parser.
|
|
* @param $name (string) Name of the closing tag found in the document.
|
|
* @see _handleStartElement(), _handleCharacterData()
|
|
*/
|
|
function _handleEndElement($parser, $name) {
|
|
if (($this->parsedTextLocation=='')
|
|
&& empty($this->nodeStack[$this->parseStackIndex]['textParts'])) {
|
|
// We reach this point when parsing a tag of format <foo/>. The 'textParts'-array
|
|
// should stay empty and not have an empty string in it.
|
|
} else {
|
|
// Trim accumulated text if necessary.
|
|
if ($this->parseSkipWhiteCache) {
|
|
$iCount = count($this->nodeStack[$this->parseStackIndex]['textParts']);
|
|
$this->nodeStack[$this->parseStackIndex]['textParts'][$iCount-1] = rtrim($this->parsedTextLocation);
|
|
}
|
|
}
|
|
|
|
if ($this->bDebugXmlParse) {
|
|
echo "Text part after element is: ".htmlspecialchars($this->parsedTextLocation)."<br>\n";
|
|
echo htmlspecialchars("Parent:<{$this->parseStackIndex}>, End-node:</$name> '".$this->parsedTextLocation) . "'<br>Text nodes:<pre>\n";
|
|
$dataPartsCount = count($this->nodeStack[$this->parseStackIndex]['textParts']);
|
|
for ($i = 0; $i < $dataPartsCount; $i++) {
|
|
echo "$i:". htmlspecialchars($this->nodeStack[$this->parseStackIndex]['textParts'][$i])."\n";
|
|
}
|
|
var_dump($this->nodeStack[$this->parseStackIndex]['textParts']);
|
|
echo "</pre></blockquote>\n";
|
|
}
|
|
|
|
// Jump back to the parent element.
|
|
$this->parseStackIndex--;
|
|
|
|
// Set our reference for where we put any more whitespace
|
|
$this->parsedTextLocation =& $this->nodeStack[$this->parseStackIndex]['textParts'][];
|
|
|
|
// Note we leave the entry in the stack, as it will get blanked over by the next element
|
|
// at this level. The safe thing to do would be to remove it too, but in the interests
|
|
// of performance, we will not bother, as were it to be a problem, then it would be an
|
|
// internal bug anyway.
|
|
if ($this->parseStackIndex < 0) {
|
|
$this->_displayError('Internal error during parse of XML file at line'. xml_get_current_line_number($parser) .'. Empty name.', __LINE__, __FILE__);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles character data while parsing.
|
|
*
|
|
* While parsing a XML document for each character data this method
|
|
* is called. It'll add the character data to the document tree.
|
|
*
|
|
* @param $parser (int) Handler for accessing the current XML parser.
|
|
* @param $text (string) Character data found in the document.
|
|
* @see _handleStartElement(), _handleEndElement()
|
|
*/
|
|
function _handleCharacterData($parser, $text) {
|
|
|
|
if ($this->parsInCData >0) $text = $this->_translateAmpersand($text, $reverse=TRUE);
|
|
|
|
if ($this->bDebugXmlParse) echo "Handling character data: '".htmlspecialchars($text)."'<br>";
|
|
if ($this->parseSkipWhiteCache AND !empty($text) AND !$this->parsInCData) {
|
|
// Special case CR. CR always comes in a separate data. Trans. it to '' or ' '.
|
|
// If txtBuffer is already ending with a space use '' otherwise ' '.
|
|
$bufferHasEndingSpace = (empty($this->parsedTextLocation) OR substr($this->parsedTextLocation, -1) === ' ') ? TRUE : FALSE;
|
|
if ($text=="\n") {
|
|
$text = $bufferHasEndingSpace ? '' : ' ';
|
|
} else {
|
|
if ($bufferHasEndingSpace) {
|
|
$text = ltrim(preg_replace('/\s+/', ' ', $text));
|
|
} else {
|
|
$text = preg_replace('/\s+/', ' ', $text);
|
|
}
|
|
}
|
|
if ($this->bDebugXmlParse) echo "'Skip white space' is ON. reduced to : '" .htmlspecialchars($text) . "'<br>";
|
|
}
|
|
$this->parsedTextLocation .= $text;
|
|
}
|
|
|
|
/**
|
|
* Default handler for the XML parser.
|
|
*
|
|
* While parsing a XML document for string not caught by one of the other
|
|
* handler functions, we end up here.
|
|
*
|
|
* @param $parser (int) Handler for accessing the current XML parser.
|
|
* @param $text (string) Character data found in the document.
|
|
* @see _handleStartElement(), _handleEndElement()
|
|
*/
|
|
function _handleDefaultData($parser, $text) {
|
|
do { // try-block
|
|
if (!strcmp($text, '<![CDATA[')) {
|
|
$this->parsInCData++;
|
|
} elseif (!strcmp($text, ']]>')) {
|
|
$this->parsInCData--;
|
|
if ($this->parsInCData < 0) $this->parsInCData = 0;
|
|
}
|
|
$this->parsedTextLocation .= $this->_translateAmpersand($text, $reverse=TRUE);
|
|
if ($this->bDebugXmlParse) echo "Default handler data: ".htmlspecialchars($text)."<br>";
|
|
break; // try-block
|
|
} while (FALSE); // END try-block
|
|
}
|
|
|
|
/**
|
|
* Handles processing instruction (PI)
|
|
*
|
|
* A processing instruction has the following format:
|
|
* <? target data ? > e.g. <? dtd version="1.0" ? >
|
|
*
|
|
* Currently I have no bether idea as to left it 'as is' and treat the PI data as normal
|
|
* text (and adding the surrounding PI-tags <? ? >).
|
|
*
|
|
* @param $parser (int) Handler for accessing the current XML parser.
|
|
* @param $target (string) Name of the PI target. E.g. XML, PHP, DTD, ...
|
|
* @param $data (string) Associative array containing a list of
|
|
* @see PHP's manual "xml_set_processing_instruction_handler"
|
|
*/
|
|
function _handlePI($parser, $target, $data) {
|
|
//echo("pi data=".$data."end"); exit;
|
|
$data = $this->_translateAmpersand($data, $reverse=TRUE);
|
|
$this->parsedTextLocation .= "<?{$target} {$data}?>";
|
|
return TRUE;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPathEngine ------ Node Tree Stuff ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Adds a new node to the XML document tree during xml parsing.
|
|
*
|
|
* This method adds a new node to the tree of nodes of the XML document
|
|
* being handled by this class. The new node is created according to the
|
|
* parameters passed to this method. This method is a much watered down
|
|
* version of appendChild(), used in parsing an xml file only.
|
|
*
|
|
* It is assumed that adding starts with root and progresses through the
|
|
* document in parse order. New nodes must have a corresponding parent. And
|
|
* once we have read the </> tag for the element we will never need to add
|
|
* any more data to that node. Otherwise the add will be ignored or fail.
|
|
*
|
|
* The function is faciliated by a nodeStack, which is an array of nodes that
|
|
* we have yet to close.
|
|
*
|
|
* @param $stackParentIndex (int) The index into the nodeStack[] of the parent
|
|
* node to which the new node should be added as
|
|
* a child. *READONLY*
|
|
* @param $nodeName (string) Name of the new node. *READONLY*
|
|
* @return (bool) TRUE if we successfully added a new child to
|
|
* the node stack at index $stackParentIndex + 1,
|
|
* FALSE on error.
|
|
*/
|
|
function _internalAppendChild($stackParentIndex, $nodeName) {
|
|
// This call is likely to be executed thousands of times, so every 0.01ms counts.
|
|
// If you want to debug this function, you'll have to comment the stuff back in
|
|
//$bDebugThisFunction = FALSE;
|
|
|
|
/*
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("_internalAppendChild");
|
|
echo "Current Node (parent-index) and the child to append : '{$stackParentIndex}' + '{$nodeName}' \n<br>";
|
|
}
|
|
*/
|
|
//////////////////////////////////////
|
|
|
|
if (!isSet($this->nodeStack[$stackParentIndex])) {
|
|
$errStr = "Invalid parent. You tried to append the tag '{$nodeName}' to an non-existing parent in our node stack '{$stackParentIndex}'.";
|
|
$this->_displayError('In _internalAppendChild(): '. $errStr, __LINE__, __FILE__, FALSE);
|
|
|
|
/*
|
|
if ($bDebugThisFunction)
|
|
$this->_closeDebugFunction($aStartTime, FALSE);
|
|
*/
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// Retrieve the parent node from the node stack. This is the last node at that
|
|
// depth that we have yet to close. This is where we should add the text/node.
|
|
$parentNode =& $this->nodeStack[$stackParentIndex];
|
|
|
|
// Brand new node please
|
|
$newChildNode = $this->emptyNode;
|
|
|
|
// Save the vital information about the node.
|
|
$newChildNode['name'] = $nodeName;
|
|
$parentNode['childNodes'][] =& $newChildNode;
|
|
|
|
// Add to our node stack
|
|
$this->nodeStack[$stackParentIndex + 1] =& $newChildNode;
|
|
|
|
/*
|
|
if ($bDebugThisFunction) {
|
|
echo "The new node received index: '".($stackParentIndex + 1)."'\n";
|
|
foreach($this->nodeStack as $key => $val) echo "$key => ".$val['name']."\n";
|
|
$this->_closeDebugFunction($aStartTime, TRUE);
|
|
}
|
|
*/
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Update nodeIndex and every node of the node-tree.
|
|
*
|
|
* Call after you have finished any tree modifications other wise a match with
|
|
* an xPathQuery will produce wrong results. The $this->nodeIndex[] is recreated
|
|
* and every nodes optimization data is updated. The optimization data is all the
|
|
* data that is duplicate information, would just take longer to find. Child nodes
|
|
* with value NULL are removed from the tree.
|
|
*
|
|
* By default the modification functions in this component will automatically re-index
|
|
* the nodes in the tree. Sometimes this is not the behaver you want. To surpress the
|
|
* reindex, set the functions $autoReindex to FALSE and call reindexNodeTree() at the
|
|
* end of your changes. This sometimes leads to better code (and less CPU overhead).
|
|
*
|
|
* Sample:
|
|
* =======
|
|
* Given the xml is <AAA><B/>.<B/>.<B/></AAA> | Goal is <AAA>.<B/>.</AAA> (Delete B[1] and B[3])
|
|
* $xPathSet = $xPath->match('//B'); # Will result in array('/AAA[1]/B[1]', '/AAA[1]/B[2]', '/AAA[1]/B[3]');
|
|
* Three ways to do it.
|
|
* 1) Top-Down (with auto reindexing) - Safe, Slow and you get easily mix up with the the changing node index
|
|
* removeChild('/AAA[1]/B[1]'); // B[1] removed, thus all B[n] become B[n-1] !!
|
|
* removeChild('/AAA[1]/B[2]'); // Now remove B[2] (That originaly was B[3])
|
|
* 2) Bottom-Up (with auto reindexing) - Safe, Slow and the changing node index (caused by auto-reindex) can be ignored.
|
|
* for ($i=sizeOf($xPathSet)-1; $i>=0; $i--) {
|
|
* if ($i==1) continue;
|
|
* removeChild($xPathSet[$i]);
|
|
* }
|
|
* 3) // Top-down (with *NO* auto reindexing) - Fast, Safe as long as you call reindexNodeTree()
|
|
* foreach($xPathSet as $xPath) {
|
|
* // Specify no reindexing
|
|
* if ($xPath == $xPathSet[1]) continue;
|
|
* removeChild($xPath, $autoReindex=FALSE);
|
|
* // The object is now in a slightly inconsistent state.
|
|
* }
|
|
* // Finally do the reindex and the object is consistent again
|
|
* reindexNodeTree();
|
|
*
|
|
* @return (bool) TRUE on success, FALSE otherwise.
|
|
* @see _recursiveReindexNodeTree()
|
|
*/
|
|
function reindexNodeTree() {
|
|
//return;
|
|
$this->nodeIndex = array();
|
|
$this->nodeIndex[''] =& $this->nodeRoot;
|
|
// Quick out for when the tree has no data.
|
|
if (empty($this->nodeRoot)) return TRUE;
|
|
return $this->_recursiveReindexNodeTree('');
|
|
}
|
|
|
|
/**
|
|
* Here's where the work is done for reindexing (see reindexNodeTree)
|
|
*
|
|
* @param $absoluteParentPath (string) the xPath to the parent node
|
|
* @return (bool) TRUE on success, FALSE otherwise.
|
|
* @see reindexNodeTree()
|
|
*/
|
|
function _recursiveReindexNodeTree($absoluteParentPath) {
|
|
$parentNode =& $this->nodeIndex[$absoluteParentPath];
|
|
|
|
// Check for any 'dead' child nodes first and concate the text parts if found.
|
|
for ($iChildIndex=sizeOf($parentNode['childNodes'])-1; $iChildIndex>=0; $iChildIndex--) {
|
|
// Check if the child node still exits (it may have been removed).
|
|
if (!empty($parentNode['childNodes'][$iChildIndex])) continue;
|
|
// Child node was removed. We got to merge the text parts then.
|
|
$parentNode['textParts'][$iChildIndex] .= $parentNode['textParts'][$iChildIndex+1];
|
|
array_splice($parentNode['textParts'], $iChildIndex+1, 1);
|
|
array_splice($parentNode['childNodes'], $iChildIndex, 1);
|
|
}
|
|
|
|
// Now start a reindex.
|
|
$contextHash = array();
|
|
$childSize = sizeOf($parentNode['childNodes']);
|
|
|
|
// If there are no children, we have to treat this specially:
|
|
if ($childSize == 0) {
|
|
// Add a dummy text node.
|
|
$this->nodeIndex[$absoluteParentPath.'/text()[1]'] =& $parentNode;
|
|
} else {
|
|
for ($iChildIndex=0; $iChildIndex<$childSize; $iChildIndex++) {
|
|
$childNode =& $parentNode['childNodes'][$iChildIndex];
|
|
// Make sure that there is a text-part in front of every node. (May be empty)
|
|
if (!isSet($parentNode['textParts'][$iChildIndex])) $parentNode['textParts'][$iChildIndex] = '';
|
|
// Count the nodes with same name (to determine their context position)
|
|
$childName = $childNode['name'];
|
|
if (empty($contextHash[$childName])) {
|
|
$contextPos = $contextHash[$childName] = 1;
|
|
} else {
|
|
$contextPos = ++$contextHash[$childName];
|
|
}
|
|
// Make the node-index hash
|
|
$newPath = $absoluteParentPath . '/' . $childName . '['.$contextPos.']';
|
|
|
|
// ### Note ultimately we will end up supporting text nodes as actual nodes.
|
|
|
|
// Preceed with a dummy entry for the text node.
|
|
$this->nodeIndex[$absoluteParentPath.'/text()['.($childNode['pos']+1).']'] =& $childNode;
|
|
// Then the node itself
|
|
$this->nodeIndex[$newPath] =& $childNode;
|
|
|
|
// Now some dummy nodes for each of the attribute nodes.
|
|
$iAttributeCount = sizeOf($childNode['attributes']);
|
|
if ($iAttributeCount > 0) {
|
|
$aAttributesNames = array_keys($childNode['attributes']);
|
|
for ($iAttributeIndex = 0; $iAttributeIndex < $iAttributeCount; $iAttributeIndex++) {
|
|
$attribute = $aAttributesNames[$iAttributeIndex];
|
|
$this->nodeIndex["$newPath/attribute::$attribute"] =& $childNode;
|
|
}
|
|
}
|
|
|
|
// Update the node info (optimisation)
|
|
$childNode['parentNode'] =& $parentNode;
|
|
$childNode['depth'] = $parentNode['depth'] +1;
|
|
$childNode['pos'] = $iChildIndex;
|
|
$childNode['contextPos'] = $contextHash[$childName];
|
|
$childNode['xpath'] = $newPath;
|
|
$this->_recursiveReindexNodeTree($newPath);
|
|
|
|
// Follow with a dummy entry for the text node.
|
|
$this->nodeIndex[$absoluteParentPath.'/text()['.($childNode['pos']+2).']'] =& $childNode;
|
|
}
|
|
|
|
// Make sure that their is a text-part after the last node.
|
|
if (!isSet($parentNode['textParts'][$iChildIndex])) $parentNode['textParts'][$iChildIndex] = '';
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Clone a node and it's child nodes.
|
|
*
|
|
* NOTE: If the node has children you *MUST* use the reference operator!
|
|
* E.g. $clonedNode =& cloneNode($node);
|
|
* Otherwise the children will not point back to the parent, they will point
|
|
* back to your temporary variable instead.
|
|
*
|
|
* @param $node (mixed) Either a node (hash array) or an abs. Xpath to a node in
|
|
* the current doc
|
|
* @return (&array) A node and it's child nodes.
|
|
*/
|
|
function &cloneNode($node, $recursive=FALSE) {
|
|
if (is_string($node) AND isSet($this->nodeIndex[$node])) {
|
|
$node = $this->nodeIndex[$node];
|
|
}
|
|
// Copy the text-parts ()
|
|
$textParts = $node['textParts'];
|
|
$node['textParts'] = array();
|
|
foreach ($textParts as $key => $val) {
|
|
$node['textParts'][] = $val;
|
|
}
|
|
|
|
$childSize = sizeOf($node['childNodes']);
|
|
for ($i=0; $i<$childSize; $i++) {
|
|
$childNode =& $this->cloneNode($node['childNodes'][$i], TRUE); // copy child
|
|
$node['childNodes'][$i] =& $childNode; // reference the copy
|
|
$childNode['parentNode'] =& $node; // child references the parent.
|
|
}
|
|
|
|
if (!$recursive) {
|
|
//$node['childNodes'][0]['parentNode'] = null;
|
|
//print "<pre>";
|
|
//var_dump($node);
|
|
}
|
|
return $node;
|
|
}
|
|
|
|
|
|
/** Nice to have but __sleep() has a bug.
|
|
(2002-2 PHP V4.1. See bug #15350)
|
|
|
|
/**
|
|
* PHP cals this function when you call PHP's serialize.
|
|
*
|
|
* It prevents cyclic referencing, which is why print_r() of an XPath object doesn't work.
|
|
*
|
|
function __sleep() {
|
|
// Destroy recursive pointers
|
|
$keys = array_keys($this->nodeIndex);
|
|
$size = sizeOf($keys);
|
|
for ($i=0; $i<$size; $i++) {
|
|
unset($this->nodeIndex[$keys[$i]]['parentNode']);
|
|
}
|
|
unset($this->nodeIndex);
|
|
}
|
|
|
|
/**
|
|
* PHP cals this function when you call PHP's unserialize.
|
|
*
|
|
* It reindexes the node-tree
|
|
*
|
|
function __wakeup() {
|
|
$this->reindexNodeTree();
|
|
}
|
|
|
|
*/
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ XPath Query / Evaluation Handlers ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Matches (evaluates) an XPath query
|
|
*
|
|
* This method tries to evaluate an XPath query by parsing it. A XML source must
|
|
* have been imported before this method is able to work.
|
|
*
|
|
* @param $xPathQuery (string) XPath query to be evaluated.
|
|
* @param $baseXPath (string) (default is super-root) Full path of a document node,
|
|
* from which the XPath query should start evaluating.
|
|
* @return (mixed) The result of the XPath expression. Either:
|
|
* node-set (an ordered collection of nodes without duplicates)
|
|
* boolean (true or false)
|
|
* number (a floating-point number)
|
|
* string (a sequence of UCS characters)
|
|
*/
|
|
function match($xPathQuery, $baseXPath='') {
|
|
// Replace a double slashes, because they'll cause problems otherwise.
|
|
static $slashes2descendant = array(
|
|
'//@' => '/descendant_or_self::*/attribute::',
|
|
'//' => '/descendant_or_self::node()/',
|
|
'/@' => '/attribute::');
|
|
// Stupid idea from W3C to take axes name containing a '-' (dash) !!!
|
|
// We replace the '-' with '_' to avoid the conflict with the minus operator.
|
|
static $dash2underscoreHash = array(
|
|
'-sibling' => '_sibling',
|
|
'-or-' => '_or_',
|
|
'starts-with' => 'starts_with',
|
|
'substring-before' => 'substring_before',
|
|
'substring-after' => 'substring_after',
|
|
'string-length' => 'string_length',
|
|
'normalize-space' => 'normalize_space');
|
|
|
|
if (empty($xPathQuery)) return array();
|
|
|
|
// Special case for when document is empty.
|
|
if (empty($this->nodeRoot)) return array();
|
|
|
|
if (!isSet($this->nodeIndex[$baseXPath])) {
|
|
$this->_displayError(sprintf($this->errorStrings['AbsoluteXPathRequired'],$xPathQuery), __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
// Replace a double slashes, and '-' (dash) in axes names.
|
|
$xPathQuery = strtr($xPathQuery, $slashes2descendant);
|
|
$xPathQuery = strtr($xPathQuery, $dash2underscoreHash);
|
|
|
|
// We should possibly do a proper syntactical parse, but instead we will cheat and just
|
|
// remove any literals that could make things very difficult for us, and replace them with
|
|
// special tags. Then we can treat the xPathQuery much more easily. Provided there are no
|
|
// literals in the string, then we can guarentee that most of the operators and syntactical
|
|
// elements are indeed elements and not just part of a literal string.
|
|
$processedxPathQuery = $this->_removeLiterals($xPathQuery);
|
|
|
|
// Build the context
|
|
$context = array('nodePath' => $baseXPath, 'pos' => 1, 'size' => 1);
|
|
|
|
// The primary syntactic construct in XPath is the expression.
|
|
$result = $this->_evaluateExpr($processedxPathQuery, $context);
|
|
|
|
// We might have been returned a string.. If so convert back to a literal
|
|
$literalString = $this->_asLiteral($result);
|
|
if ($literalString != FALSE) return $literalString;
|
|
else return $result;
|
|
}
|
|
|
|
/**
|
|
* Alias for the match function
|
|
*
|
|
* @see match()
|
|
*/
|
|
function evaluate($xPathQuery, $baseXPath='') {
|
|
return $this->match($xPathQuery, $baseXPath);
|
|
}
|
|
|
|
/**
|
|
* Parse out the literals of an XPath expression.
|
|
*
|
|
* Instead of doing a full lexical parse, we parse out the literal strings, and then
|
|
* Treat the sections of the string either as parts of XPath or literal strings. So
|
|
* this function replaces each literal it finds with a literal reference, and then inserts
|
|
* the reference into an array of strings that we can access. The literals can be accessed
|
|
* later from the literals associative array.
|
|
*
|
|
* Example:
|
|
* XPathExpr = /AAA[@CCC = "hello"]/BBB[DDD = 'world']
|
|
* => literals: array("hello", "world")
|
|
* return value: /AAA[@CCC = $1]/BBB[DDD = $2]
|
|
*
|
|
* Note: This does not interfere with the VariableReference syntactical element, as these
|
|
* elements must not start with a number.
|
|
*
|
|
* @param $xPathQuery (string) XPath expression to be processed
|
|
* @return (string) The XPath expression without the literals.
|
|
*
|
|
*/
|
|
function _removeLiterals($xPathQuery) {
|
|
// What comes first? A " or a '?
|
|
if (!preg_match(":^([^\"']*)([\"'].*)$:", $xPathQuery, $aMatches)) {
|
|
// No " or ' means no more literals.
|
|
return $xPathQuery;
|
|
}
|
|
|
|
$result = $aMatches[1];
|
|
$remainder = $aMatches[2];
|
|
// What kind of literal?
|
|
if (preg_match(':^"([^"]*)"(.*)$:', $remainder, $aMatches)) {
|
|
// A "" literal.
|
|
$literal = $aMatches[1];
|
|
$remainder = $aMatches[2];
|
|
} else if (preg_match(":^'([^']*)'(.*)$:", $remainder, $aMatches)) {
|
|
// A '' literal.
|
|
$literal = $aMatches[1];
|
|
$remainder = $aMatches[2];
|
|
} else {
|
|
$this->_displayError("The '$xPathQuery' argument began a literal, but did not close it.", __LINE__, __FILE__);
|
|
}
|
|
|
|
// Store the literal
|
|
$literalNumber = count($this->axPathLiterals);
|
|
$this->axPathLiterals[$literalNumber] = $literal;
|
|
$result .= '$'.$literalNumber;
|
|
return $result.$this->_removeLiterals($remainder);
|
|
}
|
|
|
|
/**
|
|
* Returns the given string as a literal reference.
|
|
*
|
|
* @param $string (string) The string that we are processing
|
|
* @return (mixed) The literal string. FALSE if the string isn't a literal reference.
|
|
*/
|
|
function _asLiteral($string) {
|
|
if (empty($string[0])) return FALSE;
|
|
if ($string[0] == '$') {
|
|
$remainder = substr($string, 1);
|
|
if (is_numeric($remainder)) {
|
|
// We have a string reference then.
|
|
$stringNumber = (int)$remainder;
|
|
if ($stringNumber >= count($this->axPathLiterals)) {
|
|
$this->_displayError("Internal error. Found a string reference that we didn't set in xPathQuery: '$xPathQuery'.", __LINE__, __FILE__);
|
|
return FALSE;
|
|
}
|
|
return $this->axPathLiterals[$stringNumber];
|
|
}
|
|
}
|
|
|
|
// It's not a reference then.
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Adds a literal to our array of literals
|
|
*
|
|
* In order to make sure we don't interpret literal strings as XPath expressions, we have to
|
|
* encode literal strings so that we know that they are not XPaths.
|
|
*
|
|
* @param $string (string) The literal string that we need to store for future access
|
|
* @return (mixed) A reference string to this literal.
|
|
*/
|
|
function _addLiteral($string) {
|
|
// Store the literal
|
|
$literalNumber = count($this->axPathLiterals);
|
|
$this->axPathLiterals[$literalNumber] = $string;
|
|
$result = '$'.$literalNumber;
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Internal recursive evaluate an-XPath-expression function.
|
|
*
|
|
* $this->evaluate() is the entry point and does some inits, while this
|
|
* function is called recursive internaly for every sub-xPath expresion we find.
|
|
*
|
|
* @param $xPathQuery (string) XPath query to be evaluated.
|
|
* @param $context (array) An associative array the describes the context from which
|
|
* to evaluate the XPath Expr. Contains three members:
|
|
* 'nodePath' => The absolute XPath expression to the context node
|
|
* 'size' => The context size
|
|
* 'pos' => The context position
|
|
* @return (mixed) The result of the XPath expression. Either:
|
|
* node-set (an ordered collection of nodes without duplicates)
|
|
* boolean (true or false)
|
|
* number (a floating-point number)
|
|
* string (a sequence of UCS characters)
|
|
* @see evaluate()
|
|
*/
|
|
function _evaluateExpr($xPathQuery, $context) {
|
|
// If you are having difficulty using this function. Then set this to TRUE and
|
|
// you'll get diagnostic info displayed to the output.
|
|
$bDebugThisFunction = FALSE;
|
|
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("_evaluateExpr");
|
|
echo "Path: $xPathQuery\n";
|
|
echo "Context:";
|
|
$this->_printContext($context);
|
|
echo "\n";
|
|
}
|
|
|
|
// Numpty check
|
|
if (!isset($xPathQuery) || ($xPathQuery == '')) {
|
|
$this->_displayError("The \$xPathQuery argument must have a value.", __LINE__, __FILE__);
|
|
return FALSE;
|
|
}
|
|
|
|
// At the top level we deal with booleans. Only if the Expr is just an AdditiveExpr will
|
|
// the result not be a boolean.
|
|
//
|
|
// [14] Expr ::= OrExpr
|
|
// [21] OrExpr ::= AndExpr
|
|
// | OrExpr 'or' AndExpr
|
|
// [22] AndExpr ::= EqualityExpr
|
|
// | AndExpr 'and' EqualityExpr
|
|
// [23] EqualityExpr ::= RelationalExpr
|
|
// | EqualityExpr '=' RelationalExpr
|
|
// | EqualityExpr '!=' RelationalExpr
|
|
// [24] RelationalExpr ::= AdditiveExpr
|
|
// | RelationalExpr '<' AdditiveExpr
|
|
// | RelationalExpr '>' AdditiveExpr
|
|
// | RelationalExpr '<=' AdditiveExpr
|
|
// | RelationalExpr '>=' AdditiveExpr
|
|
// [25] AdditiveExpr ::= MultiplicativeExpr
|
|
// | AdditiveExpr '+' MultiplicativeExpr
|
|
// | AdditiveExpr '-' MultiplicativeExpr
|
|
// [26] MultiplicativeExpr ::= UnaryExpr
|
|
// | MultiplicativeExpr MultiplyOperator UnaryExpr
|
|
// | MultiplicativeExpr 'div' UnaryExpr
|
|
// | MultiplicativeExpr 'mod' UnaryExpr
|
|
// [27] UnaryExpr ::= UnionExpr
|
|
// | '-' UnaryExpr
|
|
// [18] UnionExpr ::= PathExpr
|
|
// | UnionExpr '|' PathExpr
|
|
//
|
|
// NOTE: The effect of the above grammar is that the order of precedence is
|
|
// (lowest precedence first):
|
|
// 1) or
|
|
// 2) and
|
|
// 3) =, !=
|
|
// 4) <=, <, >=, >
|
|
// 5) +, -
|
|
// 6) *, div, mod
|
|
// 7) - (negate)
|
|
// 8) |
|
|
//
|
|
// Between these syntactical elements we get PathExprs.
|
|
|
|
// Do while false loop
|
|
do {
|
|
// An expression can be one of these, and we should catch these "first".
|
|
//
|
|
// [15] PrimaryExpr ::= VariableReference
|
|
// | '(' Expr ')'
|
|
// | Literal
|
|
// | Number
|
|
// | FunctionCall
|
|
|
|
// If it is surrounded by () then trim the brackets
|
|
while (preg_match(":^\((.*)\):", $xPathQuery, $aMatches)) {
|
|
$xPathQuery = $aMatches[1];
|
|
}
|
|
|
|
/////////////////////////////////////////////
|
|
// Easy outs
|
|
|
|
// Is it a number?
|
|
if (is_numeric($xPathQuery)) {
|
|
$result = $xPathQuery;
|
|
break;
|
|
}
|
|
|
|
// If it starts with $, and the remainder is a number, then it's a string.
|
|
$literal = $this->_asLiteral($xPathQuery);
|
|
if ($literal !== FALSE) {
|
|
$result = $xPathQuery;
|
|
break;
|
|
}
|
|
|
|
// Is it a function?
|
|
{
|
|
// Check whether it's all wrapped in a function. will be like count(.*) where .* is anything
|
|
// text() will try to be matched here, so just explicitly ignore it
|
|
$regex = ":^([^\(\)\[\]/]*)\s*\((.*)\)$:U";
|
|
if (preg_match($regex, $xPathQuery, $aMatch) && $xPathQuery != "text()") {
|
|
$function = $aMatch[1];
|
|
$data = $aMatch[2];
|
|
// It is possible that we will get "a() or b()" which will match as function "a" with
|
|
// arguments ") or b(" which is clearly wrong... _bracketsCheck() should catch this.
|
|
if ($this->_bracketsCheck($data)) {
|
|
if ($bDebugThisFunction) echo "XPathExpr: $xPathQuery is a $function() function call:\n";
|
|
if (in_array($function, $this->functions)) {
|
|
$result = $this->_evaluateFunction($function, $data, $context);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////
|
|
// Check for operators.
|
|
// Set the default position and the type of the operator.
|
|
$position = 0;
|
|
$operator = '';
|
|
|
|
// Run through all operators and try to find one.
|
|
$opSize = sizeOf($this->operators);
|
|
for ($i=0; $i<$opSize; $i++) {
|
|
// Have we found an operator yet?
|
|
if ($position >0) break;
|
|
$operator = $this->operators[$i];
|
|
// Quickcheck. If not present don't wast time searching 'the hard way'
|
|
if (strpos($xPathQuery, $operator)===FALSE) continue;
|
|
// Special check
|
|
$position = $this->_searchString($xPathQuery, $operator);
|
|
// Check whether a operator was found.
|
|
if ($position <= 0 ) continue;
|
|
// Check whether it's the equal operator.
|
|
if ($operator == '=') {
|
|
// Also look for other operators containing the equal sign.
|
|
switch ($xPathQuery[$position-1]) {
|
|
case '<' :
|
|
$position--;
|
|
$operator = '<=';
|
|
break;
|
|
case '>' :
|
|
$position--;
|
|
$operator = '>=';
|
|
break;
|
|
case '!' :
|
|
$position--;
|
|
$operator = '!=';
|
|
break;
|
|
default:
|
|
// It's a pure = operator then.
|
|
}
|
|
}
|
|
if ($operator == '*') {
|
|
// http://www.w3.org/TR/xpath#exprlex:
|
|
// "If there is a preceding token and the preceding token is not one of @, ::, (, [,
|
|
// or an Operator, then a * must be recognized as a MultiplyOperator and an NCName must
|
|
// be recognized as an OperatorName."
|
|
|
|
// Get some substrings.
|
|
$character = substr($xPathQuery, $position - 1, 1);
|
|
|
|
// Check whether it's a multiply operator or a name test.
|
|
if (strchr('/@:([', $character) != FALSE) {
|
|
// Don't use the operator.
|
|
$operator = '';
|
|
$position = -1;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Extremely annoyingly, we could have a node name like "for-each" and we should not
|
|
// parse this as a "-" operator. So if the first char of the right operator is alphabetic,
|
|
// then this is NOT an interger operator.
|
|
if (strchr('-+*', $operator) != FALSE) {
|
|
$rightOperand = trim(substr($xPathQuery, $position + strlen($operator)));
|
|
if (strlen($rightOperand) > 1) {
|
|
if (preg_match(':^\D$:', $rightOperand[0])) {
|
|
// Don't use the operator.
|
|
$operator = '';
|
|
$position = -1;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // end while each($this->operators)
|
|
|
|
/////////////////////////////////////////////
|
|
// Check whether an operator was found.
|
|
if ($position <= 0) {
|
|
// No operator. Means we have a PathExpr then. Go to the next level.
|
|
$result = $this->_evaluatePathExpr($xPathQuery, $context);
|
|
break;
|
|
}
|
|
|
|
/////////////////////////////////////////////
|
|
// Recursively process the operator
|
|
|
|
// Check the kind of operator.
|
|
switch ($operator) {
|
|
case ' or ':
|
|
case ' and ':
|
|
case '!=':
|
|
$operatorType = 'Boolean';
|
|
break;
|
|
case '<=':
|
|
case '<':
|
|
case '>=':
|
|
case '>':
|
|
case '+':
|
|
case '-':
|
|
case '*':
|
|
case ' div ':
|
|
case ' mod ':
|
|
$operatorType = 'Integer';
|
|
break;
|
|
case ' | ':
|
|
$operatorType = 'NodeSet';
|
|
break;
|
|
case '=':
|
|
$operatorType = 'Multi';
|
|
break;
|
|
default:
|
|
$this->_displayError("Internal error. Default case of switch statement reached.", __LINE__, __FILE__);
|
|
}
|
|
|
|
if ($bDebugThisFunction) echo "\nOperator is a [$operator]($operatorType operator) at pos '$position'";
|
|
|
|
/////////////////////////////////////////////
|
|
// Get the operands
|
|
|
|
// Get the left and the right part of the expression.
|
|
$leftOperand = trim(substr($xPathQuery, 0, $position));
|
|
$rightOperand = trim(substr($xPathQuery, $position + strlen($operator)));
|
|
if ($bDebugThisFunction) echo "\nLEFT:[$leftOperand] oper:[$operator] RIGHT:[$rightOperand]";
|
|
|
|
// Remove whitespaces.
|
|
$leftOperand = trim($leftOperand);
|
|
$rightOperand = trim($rightOperand);
|
|
|
|
/////////////////////////////////////////////
|
|
// Evaluate the operands
|
|
|
|
// Evaluate the left and the right part.
|
|
if (!empty($leftOperand)) {
|
|
if ($bDebugThisFunction) echo "\nEvaluating LEFT:[$leftOperand]\n";
|
|
$left = $this->_evaluateExpr($leftOperand, $context);
|
|
if ($bDebugThisFunction) {echo "$leftOperand evals as:\n"; print_r($left); }
|
|
}
|
|
|
|
// If it is a boolean operator, it's possible we don't need to evaluate the right part.
|
|
|
|
// Only evaluate the right part if we need to.
|
|
$bEvaluateRightPart = TRUE;
|
|
$right = '';
|
|
if ($operatorType == 'Boolean') {
|
|
$right = FALSE;
|
|
// Is the left part false?
|
|
$left = $this->_handleFunction_boolean($left, $context);
|
|
if (!$left and ($operator == ' and ')) {
|
|
$bEvaluateRightPart = FALSE;
|
|
$right = FALSE;
|
|
} else if ($left and ($operator == ' or ')) {
|
|
$bEvaluateRightPart = FALSE;
|
|
$right = TRUE;
|
|
}
|
|
}
|
|
|
|
// And do we need to?
|
|
if ($bEvaluateRightPart) {
|
|
if ($bDebugThisFunction) echo "\nEvaluating RIGHT:[$rightOperand]\n";
|
|
$right = $this->_evaluateExpr($rightOperand, $context);
|
|
if ($bDebugThisFunction) {echo "$rightOperand evals as:\n"; print_r($right); }
|
|
} else {
|
|
if ($bDebugThisFunction) echo "\nNo point in evaluating the right predicate: [$rightOperand]";
|
|
}
|
|
|
|
/////////////////////////////////////////////
|
|
// Combine the operands
|
|
|
|
// Work out how to treat the multi operator
|
|
if ($operatorType == 'Multi') {
|
|
if (is_bool($left) || is_bool($right)) {
|
|
$operatorType = 'Boolean';
|
|
} elseif (is_int($left) || is_int($right)) {
|
|
$operatorType = 'Integer';
|
|
} elseif (!is_array($left) || !is_array($right)) {
|
|
$operatorType = 'String';
|
|
} elseif (is_array($left) || is_array($right)) {
|
|
$operatorType = 'Integer';
|
|
} else {
|
|
$operatorType = 'String';
|
|
}
|
|
if ($bDebugThisFunction) echo "Equals operator is a $operatorType operator\n";
|
|
}
|
|
|
|
// Handle the operator depending on the operator type.
|
|
switch ($operatorType) {
|
|
case 'Boolean':
|
|
{
|
|
// Boolify the arguments. (The left arg is already a bool)
|
|
$right = $this->_handleFunction_boolean($right, $context);
|
|
switch ($operator) {
|
|
case '=': // Compare the two results.
|
|
$result = (bool)($left == $right);
|
|
break;
|
|
case ' or ': // Return the two results connected by an 'or'.
|
|
$result = (bool)( $left or $right );
|
|
break;
|
|
case ' and ': // Return the two results connected by an 'and'.
|
|
$result = (bool)( $left and $right );
|
|
break;
|
|
case '!=': // Check whether the two results are not equal.
|
|
$result = (bool)( $left != $right );
|
|
break;
|
|
default:
|
|
$this->_displayError("Internal error. Default case of switch statement reached.", __LINE__, __FILE__);
|
|
}
|
|
}
|
|
break;
|
|
case 'Integer':
|
|
{
|
|
// Convert both left and right operands into numbers.
|
|
if (empty($left) && ($operator == '-')) {
|
|
// There may be no left operator if the op is '-'
|
|
$left = 0;
|
|
} else {
|
|
$left = $this->_handleFunction_number($left, $context);
|
|
}
|
|
$right = $this->_handleFunction_number($right, $context);
|
|
if ($bDebugThisFunction) echo "\nLeft is $left, Right is $right\n";
|
|
switch ($operator) {
|
|
case '=': // Compare the two results.
|
|
$result = (bool)($left == $right);
|
|
break;
|
|
case '+': // Return the result by adding one result to the other.
|
|
$result = $left + $right;
|
|
break;
|
|
case '-': // Return the result by decrease one result by the other.
|
|
$result = $left - $right;
|
|
break;
|
|
case '*': // Return a multiplication of the two results.
|
|
$result = $left * $right;
|
|
break;
|
|
case ' div ': // Return a division of the two results.
|
|
$result = $left / $right;
|
|
break;
|
|
case ' mod ': // Return a modulo division of the two results.
|
|
$result = $left % $right;
|
|
break;
|
|
case '<=': // Compare the two results.
|
|
$result = (bool)( $left <= $right );
|
|
break;
|
|
case '<': // Compare the two results.
|
|
$result = (bool)( $left < $right );
|
|
break;
|
|
case '>=': // Compare the two results.
|
|
$result = (bool)( $left >= $right );
|
|
break;
|
|
case '>': // Compare the two results.
|
|
$result = (bool)( $left > $right );
|
|
break;
|
|
default:
|
|
$this->_displayError("Internal error. Default case of switch statement reached.", __LINE__, __FILE__);
|
|
}
|
|
}
|
|
break;
|
|
case 'NodeSet':
|
|
// Add the nodes to the result set
|
|
$result = array_merge($left, $right);
|
|
// Remove duplicated nodes.
|
|
$result = array_unique($result);
|
|
|
|
// Preserve doc order if there was more than one query.
|
|
if (count($result) > 1) {
|
|
$result = $this->_sortByDocOrder($result);
|
|
}
|
|
break;
|
|
case 'String':
|
|
$left = $this->_handleFunction_string($left, $context);
|
|
$right = $this->_handleFunction_string($right, $context);
|
|
if ($bDebugThisFunction) echo "\nLeft is $left, Right is $right\n";
|
|
switch ($operator) {
|
|
case '=': // Compare the two results.
|
|
$result = (bool)($left == $right);
|
|
break;
|
|
default:
|
|
$this->_displayError("Internal error. Default case of switch statement reached.", __LINE__, __FILE__);
|
|
}
|
|
break;
|
|
default:
|
|
$this->_displayError("Internal error. Default case of switch statement reached.", __LINE__, __FILE__);
|
|
}
|
|
} while (FALSE);
|
|
|
|
//////////////////////////////////////////////
|
|
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $result);
|
|
}
|
|
// Return the result.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Internal recursive evaluate an Path expression.
|
|
*
|
|
* @param $PathExpr (string) PathExpr syntactical element
|
|
* @param $context (array) The context from which to evaluate
|
|
* @return (mixed) The result of the XPath expression. Either:
|
|
* node-set (an ordered collection of nodes without duplicates)
|
|
* boolean (true or false)
|
|
* number (a floating-point number)
|
|
* string (a sequence of UCS characters)
|
|
* @see evaluate()
|
|
*/
|
|
function _evaluatePathExpr($PathExpr, $context) {
|
|
// If you are having difficulty using this function. Then set this to TRUE and
|
|
// you'll get diagnostic info displayed to the output.
|
|
$bDebugThisFunction = FALSE;
|
|
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("_evaluatePathExpr");
|
|
echo "PathExpr: $PathExpr\n";
|
|
echo "Context:";
|
|
$this->_printContext($context);
|
|
echo "\n";
|
|
}
|
|
|
|
// Numpty check
|
|
if (empty($PathExpr)) {
|
|
$this->_displayError("The \$PathExpr argument must have a value.", __LINE__, __FILE__);
|
|
return FALSE;
|
|
}
|
|
//////////////////////////////////////////////
|
|
|
|
// mini syntax check
|
|
if (!$this->_bracketsCheck($PathExpr)) {
|
|
$this->_displayError('While parsing an XPath query, in the PathExpr "' .
|
|
$PathExpr.
|
|
'", there was an invalid number of brackets or a bracket mismatch.', __LINE__, __FILE__);
|
|
}
|
|
// Save the current path.
|
|
$this->currentXpathQuery = $PathExpr;
|
|
// Split the path at every slash *outside* a bracket.
|
|
$steps = $this->_bracketExplode('/', $PathExpr);
|
|
if ($bDebugThisFunction) { echo "<hr>Split the path '$PathExpr' at every slash *outside* a bracket.\n "; print_r($steps); }
|
|
// Check whether the first element is empty.
|
|
if (empty($steps[0])) {
|
|
// Remove the first and empty element. It's a starting '//'.
|
|
array_shift($steps);
|
|
}
|
|
// Start to evaluate the steps.
|
|
$result = $this->_evaluateStep($steps, $context);
|
|
|
|
// Preserve doc order if there was more than one result
|
|
if (count($result) > 1) {
|
|
$result = $this->_sortByDocOrder($result);
|
|
}
|
|
//////////////////////////////////////////////
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $result);
|
|
}
|
|
// Return the result.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Sort an xPathSet by doc order.
|
|
*
|
|
* @param $xPathSet (array) Array of full paths to nodes that need to be sorted
|
|
* @return (array) Array containing the same contents as $xPathSet, but
|
|
* with the contents in doc order
|
|
*/
|
|
function _sortByDocOrder($xPathSet) {
|
|
// If you are having difficulty using this function. Then set this to TRUE and
|
|
// you'll get diagnostic info displayed to the output.
|
|
$bDebugThisFunction = FALSE;
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction(__LINE__.":_sortByDocOrder(xPathSet:[".count($xPathSet)."])");
|
|
echo "xPathSet:\n";
|
|
print_r($xPathSet);
|
|
echo "<hr>\n";
|
|
}
|
|
//////////////////////////////////////////////
|
|
|
|
$aResult = array();
|
|
|
|
// Spot some common shortcuts.
|
|
if (count($xPathSet) < 1) {
|
|
$aResult = $xPathSet;
|
|
} else {
|
|
// Build an array of doc-pos indexes.
|
|
$aDocPos = array();
|
|
$nodeCount = count($this->nodeIndex);
|
|
$aPaths = array_keys($this->nodeIndex);
|
|
if ($bDebugThisFunction) {
|
|
echo "searching for path indices in array_keys(this->nodeIndex)...\n";
|
|
//print_r($aPaths);
|
|
}
|
|
|
|
// The last index we found. In general the elements will be in groups
|
|
// that are themselves in order.
|
|
$iLastIndex = 0;
|
|
foreach ($xPathSet as $path) {
|
|
// Cycle round the nodes, starting at the last index, looking for the path.
|
|
$foundNode = FALSE;
|
|
for ($iIndex = $iLastIndex; $iIndex < $nodeCount + $iLastIndex; $iIndex++) {
|
|
$iThisIndex = $iIndex % $nodeCount;
|
|
if (!strcmp($aPaths[$iThisIndex],$path)) {
|
|
// we have found the doc-position index of the path
|
|
$aDocPos[] = $iThisIndex;
|
|
$iLastIndex = $iThisIndex;
|
|
$foundNode = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if ($bDebugThisFunction) {
|
|
if (!$foundNode)
|
|
echo "Error: $path not found in \$this->nodeIndex\n";
|
|
else
|
|
echo "Found node after ".($iIndex - $iLastIndex)." iterations\n";
|
|
}
|
|
}
|
|
// Now count the number of doc pos we have and the number of results and
|
|
// confirm that we have the same number of each.
|
|
$iDocPosCount = count($aDocPos);
|
|
$iResultCount = count($xPathSet);
|
|
if ($iDocPosCount != $iResultCount) {
|
|
if ($bDebugThisFunction) {
|
|
echo "count(\$aDocPos)=$iDocPosCount; count(\$result)=$iResultCount\n";
|
|
print_r(array_keys($this->nodeIndex));
|
|
}
|
|
$this->_displayError('Results from _InternalEvaluate() are corrupt. '.
|
|
'Do you need to call reindexNodeTree()?', __LINE__, __FILE__);
|
|
}
|
|
|
|
// Now sort the indexes.
|
|
sort($aDocPos);
|
|
|
|
// And now convert back to paths.
|
|
$iPathCount = count($aDocPos);
|
|
for ($iIndex = 0; $iIndex < $iPathCount; $iIndex++) {
|
|
$aResult[] = $aPaths[$aDocPos[$iIndex]];
|
|
}
|
|
}
|
|
|
|
// Our result from the function is this array.
|
|
$result = $aResult;
|
|
|
|
//////////////////////////////////////////////
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $result);
|
|
}
|
|
// Return the result.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Evaluate a step from a XPathQuery expression at a specific contextPath.
|
|
*
|
|
* Steps are the arguments of a XPathQuery when divided by a '/'. A contextPath is a
|
|
* absolute XPath (or vector of XPaths) to a starting node(s) from which the step should
|
|
* be evaluated.
|
|
*
|
|
* @param $steps (array) Vector containing the remaining steps of the current
|
|
* XPathQuery expression.
|
|
* @param $context (array) The context from which to evaluate
|
|
* @return (array) Vector of absolute XPath's as a result of the step
|
|
* evaluation. The results will not necessarily be in doc order
|
|
* @see evaluate()
|
|
*/
|
|
function _evaluateStep($steps, $context) {
|
|
// If you are having difficulty using this function. Then set this to TRUE and
|
|
// you'll get diagnostic info displayed to the output.
|
|
$bDebugThisFunction = FALSE;
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction(__LINE__.":_evaluateStep");
|
|
echo "Context:";
|
|
$this->_printContext($context);
|
|
echo "\n";
|
|
echo "Steps: ";
|
|
print_r($steps);
|
|
echo "<hr>\n";
|
|
}
|
|
//////////////////////////////////////////////
|
|
|
|
$result = array(); // Create an empty array for saving the abs. XPath's found.
|
|
|
|
$contextPaths = array(); // Create an array to save the new contexts.
|
|
$step = trim(array_shift($steps)); // Get this step.
|
|
if ($bDebugThisFunction) echo __LINE__.":Evaluating step $step\n";
|
|
|
|
$axis = $this->_getAxis($step, $context); // Get the axis of the current step.
|
|
if ($bDebugThisFunction) { echo __LINE__.":Axis of step is:\n"; print_r($axis); echo "\n";}
|
|
|
|
// Check whether it's a function.
|
|
if ($axis['axis'] == 'function') {
|
|
// Check whether an array was return by the function.
|
|
if (is_array($axis['node-test'])) {
|
|
$contextPaths = array_merge($contextPaths, $axis['node-test']); // Add the results to the list of contexts.
|
|
} else {
|
|
$contextPaths[] = $axis['node-test']; // Add the result to the list of contexts.
|
|
}
|
|
} else {
|
|
$method = '_handleAxis_' . $axis['axis']; // Create the name of the method.
|
|
|
|
// Check whether the axis handler is defined. If not display an error message.
|
|
if (!method_exists(&$this, $method)) {
|
|
$this->_displayError('While parsing an XPath query, the axis ' .
|
|
$axis['axis'] . ' could not be handled, because this version does not support this axis.', __LINE__, __FILE__);
|
|
}
|
|
if ($bDebugThisFunction) echo __LINE__.":Calling user method $method\n";
|
|
|
|
// Perform an axis action.
|
|
$contextPaths = $this->$method($axis, $context['nodePath']);
|
|
if ($bDebugThisFunction) { echo __LINE__.":We found these contexts from this step:\n"; print_r( $contextPaths ); echo "\n";}
|
|
|
|
// Check whether there are predicates.
|
|
if (count($contextPaths) > 0 && count($axis['predicate']) > 0) {
|
|
if ($bDebugThisFunction) echo __LINE__.":Filtering contexts by predicate...\n";
|
|
|
|
// Check whether each node fits the predicates.
|
|
$contextPaths = $this->_checkPredicates($contextPaths, $axis['predicate']);
|
|
}
|
|
}
|
|
|
|
// Check whether there are more steps left.
|
|
if (count($steps) > 0) {
|
|
if ($bDebugThisFunction) echo __LINE__.":Evaluating next step given the context of the first step...\n";
|
|
|
|
// Continue the evaluation of the next steps.
|
|
|
|
// Run through the array.
|
|
$size = sizeOf($contextPaths);
|
|
for ($pos=0; $pos<$size; $pos++) {
|
|
// Build new context
|
|
$newContext = array('nodePath' => $contextPaths[$pos], 'size' => $size, 'pos' => $pos + 1);
|
|
if ($bDebugThisFunction) echo __LINE__.":Evaluating step for the {$contextPaths[$pos]} context...\n";
|
|
// Call this method for this single path.
|
|
$xPathSetNew = $this->_evaluateStep($steps, $newContext);
|
|
if ($bDebugThisFunction) {echo "New results for this context:\n"; print_r($xPathSetNew);}
|
|
$result = array_merge($result, $xPathSetNew);
|
|
}
|
|
|
|
// Remove duplicated nodes.
|
|
$result = array_unique($result);
|
|
} else {
|
|
$result = $contextPaths; // Save the found contexts.
|
|
}
|
|
|
|
//////////////////////////////////////////////
|
|
if ($bDebugThisFunction) $this->_closeDebugFunction($aStartTime, $result);
|
|
|
|
// Return the result.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Checks whether a node matches predicates.
|
|
*
|
|
* This method checks whether a list of nodes passed to this method match
|
|
* a given list of predicates.
|
|
*
|
|
* @param $xPathSet (array) Array of full paths of all nodes to be tested.
|
|
* @param $predicates (array) Array of predicates to use.
|
|
* @return (array) Vector of absolute XPath's that match the given predicates.
|
|
* @see _evaluateStep()
|
|
*/
|
|
function _checkPredicates($xPathSet, $predicates) {
|
|
// If you are having difficulty using this function. Then set this to TRUE and
|
|
// you'll get diagnostic info displayed to the output.
|
|
$bDebugThisFunction = FALSE;
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("_checkPredicates(Nodes:[$xPathSet], Predicates:[$predicates])");
|
|
echo "XPathSet:";
|
|
print_r($xPathSet);
|
|
echo "Predicates:";
|
|
print_r($predicates);
|
|
echo "<hr>";
|
|
}
|
|
//////////////////////////////////////////////
|
|
// Create an empty set of nodes.
|
|
$result = array();
|
|
|
|
// Run through all predicates.
|
|
$pSize = sizeOf($predicates);
|
|
for ($j=0; $j<$pSize; $j++) {
|
|
$predicate = $predicates[$j];
|
|
if ($bDebugThisFunction) echo "Evaluating predicate \"$predicate\"\n";
|
|
|
|
// This will contain all the nodes that match this predicate
|
|
$aNewSet = array();
|
|
|
|
// Run through all nodes.
|
|
$contextSize = count($xPathSet);
|
|
for ($contextPos=0; $contextPos<$contextSize; $contextPos++) {
|
|
$xPath = $xPathSet[$contextPos];
|
|
|
|
// Build the context for this predicate
|
|
$context = array('nodePath' => $xPath, 'size' => $contextSize, 'pos' => $contextPos + 1);
|
|
|
|
// Check whether the predicate is just an number.
|
|
if (preg_match('/^\d+$/', $predicate)) {
|
|
if ($bDebugThisFunction) echo "Taking short cut and calling _handleFunction_position() directly.\n";
|
|
// Take a short cut. If it is just a position, then call
|
|
// _handleFunction_position() directly. 70% of the
|
|
// time this will be the case. ## N.S
|
|
// $check = (bool) ($predicate == $context['pos']);
|
|
$check = (bool) ($predicate == $this->_handleFunction_position('', $context));
|
|
} else {
|
|
// Else do the predicate check the long and thorough way.
|
|
$check = $this->_evaluateExpr($predicate, $context);
|
|
}
|
|
if ($bDebugThisFunction) {
|
|
echo "Evaluating the predicate returned ";
|
|
var_dump($check);
|
|
echo "\n";
|
|
}
|
|
|
|
if (is_int($check)) { // Check whether it's an integer.
|
|
// Check whether it's the current position.
|
|
$check = (bool) ($check == $this->_handleFunction_position('', $context));
|
|
} else {
|
|
$check = (bool) ($this->_handleFunction_boolean($check, $context));
|
|
if ($bDebugThisFunction) {echo $this->_handleFunction_string($check, $context);}
|
|
}
|
|
|
|
if ($bDebugThisFunction) echo "Node $xPath matches predicate $predicate: " . (($check) ? "TRUE" : "FALSE") ."\n";
|
|
|
|
// Do we add it?
|
|
if ($check) $aNewSet[] = $xPath;
|
|
}
|
|
|
|
// Use the newly filtered list.
|
|
$xPathSet = $aNewSet;
|
|
|
|
if ($bDebugThisFunction) {echo "Node set now contains : "; print_r($xPathSet); }
|
|
}
|
|
|
|
$result = $xPathSet;
|
|
|
|
//////////////////////////////////////////////
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $result);
|
|
}
|
|
// Return the array of nodes.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Evaluates an XPath function
|
|
*
|
|
* This method evaluates a given XPath function with its arguments on a
|
|
* specific node of the document.
|
|
*
|
|
* @param $function (string) Name of the function to be evaluated.
|
|
* @param $arguments (string) String containing the arguments being
|
|
* passed to the function.
|
|
* @param $context (array) The context from which to evaluate
|
|
* @return (mixed) This method returns the result of the evaluation of
|
|
* the function. Depending on the function the type of the
|
|
* return value can be different.
|
|
* @see evaluate()
|
|
*/
|
|
function _evaluateFunction($function, $arguments, $context) {
|
|
// If you are having difficulty using this function. Then set this to TRUE and
|
|
// you'll get diagnostic info displayed to the output.
|
|
$bDebugThisFunction = FALSE;
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction("_evaluateFunction");
|
|
if (is_array($arguments)) {
|
|
echo "Arguments:\n";
|
|
print_r($arguments);
|
|
} else {
|
|
echo "Arguments: $arguments\n";
|
|
}
|
|
echo "Context:";
|
|
$this->_printContext($context);
|
|
echo "\n";
|
|
echo "<hr>\n";
|
|
}
|
|
/////////////////////////////////////
|
|
// Remove whitespaces.
|
|
$function = trim($function);
|
|
$arguments = trim($arguments);
|
|
// Create the name of the function handling function.
|
|
$method = '_handleFunction_'. $function;
|
|
|
|
// Check whether the function handling function is available.
|
|
if (!method_exists(&$this, $method)) {
|
|
// Display an error message.
|
|
$this->_displayError("While parsing an XPath query, ".
|
|
"the function \"$function\" could not be handled, because this ".
|
|
"version does not support this function.", __LINE__, __FILE__);
|
|
}
|
|
if ($bDebugThisFunction) echo "Calling function $method($arguments)\n";
|
|
|
|
// Return the result of the function.
|
|
$result = $this->$method($arguments, $context);
|
|
|
|
//////////////////////////////////////////////
|
|
// Return the nodes found.
|
|
if ($bDebugThisFunction) {
|
|
$this->_closeDebugFunction($aStartTime, $result);
|
|
}
|
|
// Return the result.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Checks whether a node matches a node-test.
|
|
*
|
|
* This method checks whether a node in the document matches a given node-test.
|
|
* A node test is something like text(), node(), or an element name.
|
|
*
|
|
* @param $contextPath (string) Full xpath of the node, which should be tested for
|
|
* matching the node-test.
|
|
* @param $nodeTest (string) String containing the node-test for the node.
|
|
* @return (boolean) This method returns TRUE if the node matches the
|
|
* node-test, otherwise FALSE.
|
|
* @see evaluate()
|
|
*/
|
|
function _checkNodeTest($contextPath, $nodeTest) {
|
|
if ($nodeTest == '*') {
|
|
// * matches all element nodes.
|
|
return (!preg_match(':/[^/]+\(\)\[\d+\]$:U', $contextPath));
|
|
}
|
|
elseif (preg_match('/^[\w-]+$/', $nodeTest)) {
|
|
// It's just a node name test. It should end with "/$nodeTest[x]"
|
|
return (preg_match(':/'.$nodeTest.'\[\d+\]$:', $contextPath));
|
|
}
|
|
elseif (preg_match('/\(/U', $nodeTest)) { // Check whether it's a function.
|
|
// Get the type of function to use.
|
|
$function = $this->_prestr($nodeTest, '(');
|
|
// Check whether the node fits the method.
|
|
switch ($function) {
|
|
case 'node': // Add this node to the list of nodes.
|
|
return TRUE;
|
|
case 'text': // Check whether the node has some text.
|
|
$tmp = implode('', $this->nodeIndex[$contextPath]['textParts']);
|
|
if (!empty($tmp)) {
|
|
return TRUE; // Add this node to the list of nodes.
|
|
}
|
|
break;
|
|
/******** NOT supported (yet?)
|
|
case 'comment': // Check whether the node has some comment.
|
|
if (!empty($this->nodeIndex[$contextPath]['comment'])) {
|
|
return TRUE; // Add this node to the list of nodes.
|
|
}
|
|
break;
|
|
case 'processing-instruction':
|
|
$literal = $this->_afterstr($axis['node-test'], '('); // Get the literal argument.
|
|
$literal = substr($literal, 0, strlen($literal) - 1); // Cut the literal.
|
|
|
|
// Check whether a literal was given.
|
|
if (!empty($literal)) {
|
|
// Check whether the node's processing instructions are matching the literals given.
|
|
if ($this->nodeIndex[$context]['processing-instructions'] == $literal) {
|
|
return TRUE; // Add this node to the node-set.
|
|
}
|
|
} else {
|
|
// Check whether the node has processing instructions.
|
|
if (!empty($this->nodeIndex[$contextPath]['processing-instructions'])) {
|
|
return TRUE; // Add this node to the node-set.
|
|
}
|
|
}
|
|
break;
|
|
***********/
|
|
default: // Display an error message.
|
|
$this->_displayError('While parsing an XPath query there was an undefined function called "' .
|
|
str_replace($function, '<b>'.$function.'</b>', $this->currentXpathQuery) .'"', __LINE__, __FILE__);
|
|
}
|
|
}
|
|
else { // Display an error message.
|
|
$this->_displayError("While parsing the XPath query \"{$this->currentXpathQuery}\" ".
|
|
"an empty and therefore invalid node-test has been found.", __LINE__, __FILE__);
|
|
}
|
|
|
|
return FALSE; // Don't add this context.
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ XPath AXIS Handlers ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieves axis information from an XPath query step.
|
|
*
|
|
* This method tries to extract the name of the axis and its node-test
|
|
* from a given step of an XPath query at a given node.
|
|
*
|
|
* @param $step (string) String containing a step of an XPath query.
|
|
* @param $context (array) The context from which to evaluate
|
|
* @return (array) Contains information about the axis found in the step.
|
|
* @see _evaluateStep()
|
|
*/
|
|
function _getAxis($step, $context) {
|
|
// Create an array to save the axis information.
|
|
$axis = array(
|
|
'axis' => '',
|
|
'node-test' => '',
|
|
'predicate' => array()
|
|
);
|
|
|
|
do { // parse block
|
|
$parseBlock = 1;
|
|
|
|
///////////////////////////////////////////////////
|
|
// Spot the steps that won't come with an axis
|
|
|
|
// Check whether the step is empty or only self.
|
|
if (empty($step) OR ($step == '.') OR ($step == 'current()')) {
|
|
// Set it to the default value.
|
|
$step = '.';
|
|
$axis['axis'] = 'self';
|
|
$axis['node-test'] = '*';
|
|
break $parseBlock;
|
|
}
|
|
|
|
if ($step == '..') {
|
|
// Select the parent axis.
|
|
$axis['axis'] = 'parent';
|
|
$axis['node-test'] = '*';
|
|
break $parseBlock;
|
|
}
|
|
|
|
// Check whether is an abbreviated syntax.
|
|
if ($step == '*') {
|
|
// Use the child axis and select all children.
|
|
$axis['axis'] = 'child';
|
|
$axis['node-test'] = '*';
|
|
break $parseBlock;
|
|
}
|
|
|
|
///////////////////////////////////////////////////
|
|
// Pull off the axis
|
|
|
|
// Check for abbreviated syntax
|
|
if ($step[0] == '@') {
|
|
// Use the attribute axis and select the attribute.
|
|
$axis['axis'] = 'attribute';
|
|
$step = substr($step, 1);
|
|
} else {
|
|
// Check whether the axis is given in plain text.
|
|
if (preg_match("/^([^:]*)::(.*)$/", $step, $match)) {
|
|
// Split the step to extract axis and node-test.
|
|
$axis['axis'] = $match[1];
|
|
$step = $match[2];
|
|
} else {
|
|
// The default axis is child
|
|
$axis['axis'] = 'child';
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////
|
|
// Pull off the predicates
|
|
|
|
// Check whether there are predicates and add the predicate to the list
|
|
// of predicates without []. Get contents of every [] found.
|
|
$regex = '/\[([^\]]*)\]/';
|
|
preg_match_all($regex, $step, $regs);
|
|
if (!empty($regs[1])) {
|
|
$axis['predicate'] = $regs[1];
|
|
// Reduce the step.
|
|
$step = preg_replace($regex,"",$step); //$this->_prestr($step, '[');
|
|
}
|
|
|
|
///////////////////////////////////////////////////
|
|
// Process the rest which will either be a function or a node name
|
|
|
|
if ($step == "text()") {
|
|
// Handle the text node
|
|
$axis["node-test"] = "cdata";
|
|
break $parseBlock;
|
|
}
|
|
|
|
// Check whether it's all wrapped in a function. will be like count(.*) where .* is anything
|
|
// text() will try to be matched here, so just explicitly ignore it
|
|
$regex = ":^(.*)\s*\((.*)\)$:U";
|
|
if (preg_match($regex, $step, $match) && $step != "text()") {
|
|
$function = $match[1];
|
|
$data = $match[2];
|
|
if (in_array($function, $this->functions)) {
|
|
// Save the evaluated function.
|
|
$axis['axis'] = 'function';
|
|
$axis['node-test'] = $this->_evaluateFunction($function, $data, $context);
|
|
}
|
|
else {
|
|
$axis['node-test'] = $step;
|
|
}
|
|
break $parseBlock;
|
|
}
|
|
|
|
// We have removed the axis and the predicates, all that is left is the node test.
|
|
$axis['node-test'] = $step;
|
|
if (!empty($this->parseOptions[XML_OPTION_CASE_FOLDING])) {
|
|
// Case in-sensitive
|
|
$axis['node-test'] = strtoupper($axis['node-test']);
|
|
}
|
|
|
|
} while(FALSE); // end parse block
|
|
|
|
// Check whether it's a valid axis.
|
|
if (!in_array($axis['axis'], array_merge($this->axes, array('function')))) {
|
|
// Display an error message.
|
|
$this->_displayError('While parsing an XPath query, in the step ' .
|
|
str_replace($step, '<b>'.$step.'</b>', $this->currentXpathQuery) .
|
|
' the invalid axis ' . $axis['axis'] . ' was found.', __LINE__, __FILE__, FALSE);
|
|
}
|
|
// Return the axis information.
|
|
return $axis;
|
|
}
|
|
|
|
|
|
/**
|
|
* Handles the XPath child axis.
|
|
*
|
|
* This method handles the XPath child axis. It essentially filters out the
|
|
* children to match the name specified after the '/'.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should
|
|
* be processed.
|
|
* @return (array) A vector containing all nodes that were found, during
|
|
* the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_child($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set to hold the results of the child matches
|
|
if ($axis["node-test"] == "cdata") {
|
|
if (!isSet($this->nodeIndex[$contextPath]['textParts']) ) return '';
|
|
$tSize = sizeOf($this->nodeIndex[$contextPath]['textParts']);
|
|
for ($i=1; $i<=$tSize; $i++) {
|
|
$xPathSet[] = $contextPath . '/text()['.$i.']';
|
|
}
|
|
}
|
|
else {
|
|
// Get a list of all children.
|
|
$allChildren = $this->nodeIndex[$contextPath]['childNodes'];
|
|
|
|
// Run through all children in the order they where set.
|
|
$cSize = sizeOf($allChildren);
|
|
for ($i=0; $i<$cSize; $i++) {
|
|
$childPath = $contextPath .'/'. $allChildren[$i]['name'] .'['. $allChildren[$i]['contextPos'] .']';
|
|
$textChildPath = $contextPath.'/text()['.($i + 1).']';
|
|
// Check the text node
|
|
if ($this->_checkNodeTest($textChildPath, $axis['node-test'])) { // node test check
|
|
$xPathSet[] = $textChildPath; // Add the child to the node-set.
|
|
}
|
|
// Check the actual node
|
|
if ($this->_checkNodeTest($childPath, $axis['node-test'])) { // node test check
|
|
$xPathSet[] = $childPath; // Add the child to the node-set.
|
|
}
|
|
}
|
|
|
|
// Finally there will be one more text node to try
|
|
$textChildPath = $contextPath.'/text()['.($cSize + 1).']';
|
|
// Check the text node
|
|
if ($this->_checkNodeTest($textChildPath, $axis['node-test'])) { // node test check
|
|
$xPathSet[] = $textChildPath; // Add the child to the node-set.
|
|
}
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath parent axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the
|
|
* evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_parent($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Check whether the parent matches the node-test.
|
|
$parentPath = $this->getParentXPath($contextPath);
|
|
if ($this->_checkNodeTest($parentPath, $axis['node-test'])) {
|
|
$xPathSet[] = $parentPath; // Add this node to the list of nodes.
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath attribute axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_attribute($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Check whether all nodes should be selected.
|
|
$nodeAttr = $this->nodeIndex[$contextPath]['attributes'];
|
|
if ($axis['node-test'] == '*') {
|
|
foreach($nodeAttr as $key=>$dummy) { // Run through the attributes.
|
|
$xPathSet[] = $contextPath.'/attribute::'.$key; // Add this node to the node-set.
|
|
}
|
|
}
|
|
elseif (isset($nodeAttr[$axis['node-test']])) {
|
|
$xPathSet[] = $contextPath . '/attribute::'. $axis['node-test']; // Add this node to the node-set.
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath self axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_self($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Check whether the context match the node-test.
|
|
if ($this->_checkNodeTest($contextPath, $axis['node-test'])) {
|
|
$xPathSet[] = $contextPath; // Add this node to the node-set.
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath descendant axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_descendant($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Get a list of all children.
|
|
$allChildren = $this->nodeIndex[$contextPath]['childNodes'];
|
|
|
|
// Run through all children in the order they where set.
|
|
$cSize = sizeOf($allChildren);
|
|
for ($i=0; $i<$cSize; $i++) {
|
|
$childPath = $allChildren[$i]['xpath'];
|
|
// Check whether the child matches the node-test.
|
|
if ($this->_checkNodeTest($childPath, $axis['node-test'])) {
|
|
$xPathSet[] = $childPath; // Add the child to the list of nodes.
|
|
}
|
|
// Recurse to the next level.
|
|
$xPathSet = array_merge($xPathSet, $this->_handleAxis_descendant($axis, $childPath));
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath ancestor axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_ancestor($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
$parentPath = $this->getParentXPath($contextPath); // Get the parent of the current node.
|
|
|
|
// Check whether the parent isn't super-root.
|
|
if (!empty($parentPath)) {
|
|
// Check whether the parent matches the node-test.
|
|
if ($this->_checkNodeTest($parentPath, $axis['node-test'])) {
|
|
$xPathSet[] = $parentPath; // Add the parent to the list of nodes.
|
|
}
|
|
// Handle all other ancestors.
|
|
$xPathSet = array_merge($this->_handleAxis_ancestor($axis, $parentPath), $xPathSet);
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath namespace axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_namespace($axis, $contextPath) {
|
|
$this->_displayError("The axis 'namespace is not suported'", __LINE__, __FILE__, FALSE);
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath following axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_following($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
do { // try-block
|
|
$node = $this->nodeIndex[$contextPath]; // Get the current node
|
|
$position = $node['pos']; // Get the current tree position.
|
|
$parent = $node['parentNode'];
|
|
// Check if there is a following sibling at all; if not end.
|
|
if ($position >= sizeOf($parent['childNodes'])) break; // try-block
|
|
// Build the starting abs. XPath
|
|
$startXPath = $parent['childNodes'][$position+1]['xpath'];
|
|
// Run through all nodes of the document.
|
|
$nodeKeys = array_keys($this->nodeIndex);
|
|
$nodeSize = sizeOf($nodeKeys);
|
|
for ($k=0; $k<$nodeSize; $k++) {
|
|
if ($nodeKeys[$k] == $startXPath) break; // Check whether this is the starting abs. XPath
|
|
}
|
|
for (; $k<$nodeSize; $k++) {
|
|
// Check whether the node fits the node-test.
|
|
if ($this->_checkNodeTest($nodeKeys[$k], $axis['node-test'])) {
|
|
$xPathSet[] = $nodeKeys[$k]; // Add the node to the list of nodes.
|
|
}
|
|
}
|
|
} while(FALSE);
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath preceding axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_preceding($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Run through all nodes of the document.
|
|
foreach ($this->nodeIndex as $xPath=>$dummy) {
|
|
if (empty($xPath)) continue; // skip super-Root
|
|
|
|
// Check whether this is the context node.
|
|
if ($xPath == $contextPath) {
|
|
break; // After this we won't look for more nodes.
|
|
}
|
|
if (!strncmp($xPath, $contextPath, strLen($xPath))) {
|
|
continue;
|
|
}
|
|
// Check whether the node fits the node-test.
|
|
if ($this->_checkNodeTest($xPath, $axis['node-test'])) {
|
|
$xPathSet[] = $xPath; // Add the node to the list of nodes.
|
|
}
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath following-sibling axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_following_sibling($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Get all children from the parent.
|
|
$siblings = $this->_handleAxis_child($axis, $this->getParentXPath($contextPath));
|
|
// Create a flag whether the context node was already found.
|
|
$found = FALSE;
|
|
|
|
// Run through all siblings.
|
|
$size = sizeOf($siblings);
|
|
for ($i=0; $i<$size; $i++) {
|
|
$sibling = $siblings[$i];
|
|
|
|
// Check whether the context node was already found.
|
|
if ($found) {
|
|
// Check whether the sibling matches the node-test.
|
|
if ($this->_checkNodeTest($sibling, $axis['node-test'])) {
|
|
$xPathSet[] = $sibling; // Add the sibling to the list of nodes.
|
|
}
|
|
}
|
|
// Check if we reached *this* context node.
|
|
if ($sibling == $contextPath) {
|
|
$found = TRUE; // Continue looking for other siblings.
|
|
}
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath preceding-sibling axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_preceding_sibling($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Get all children from the parent.
|
|
$siblings = $this->_handleAxis_child($axis, $this->getParentXPath($contextPath));
|
|
|
|
// Run through all siblings.
|
|
$size = sizeOf($siblings);
|
|
for ($i=0; $i<$size; $i++) {
|
|
$sibling = $siblings[$i];
|
|
// Check whether this is the context node.
|
|
if ($sibling == $contextPath) {
|
|
break; // Don't continue looking for other siblings.
|
|
}
|
|
// Check whether the sibling matches the node-test.
|
|
if ($this->_checkNodeTest($sibling, $axis['node-test'])) {
|
|
$xPathSet[] = $sibling; // Add the sibling to the list of nodes.
|
|
}
|
|
}
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath descendant-or-self axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_descendant_or_self($axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Read the nodes.
|
|
$xPathSet = array_merge(
|
|
$this->_handleAxis_self($axis, $contextPath),
|
|
$this->_handleAxis_descendant($axis, $contextPath)
|
|
);
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath ancestor-or-self axis.
|
|
*
|
|
* This method handles the XPath ancestor-or-self axis.
|
|
*
|
|
* @param $axis (array) Array containing information about the axis.
|
|
* @param $contextPath (string) xpath to starting node from which the axis should be processed.
|
|
* @return (array) A vector containing all nodes that were found, during the evaluation of the axis.
|
|
* @see evaluate()
|
|
*/
|
|
function _handleAxis_ancestor_or_self ( $axis, $contextPath) {
|
|
$xPathSet = array(); // Create an empty node-set.
|
|
|
|
// Read the nodes.
|
|
$xPathSet = array_merge(
|
|
$this->_handleAxis_ancestor($axis, $contextPath),
|
|
$this->_handleAxis_self($axis, $contextPath)
|
|
);
|
|
return $xPathSet; // Return the nodeset.
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ XPath FUNCTION Handlers ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Handles the XPath function last.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_last($arguments, $context) {
|
|
return $context['size'];
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function position.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_position($arguments, $context) {
|
|
return $context['pos'];
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function count.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_count($arguments, $context) {
|
|
// Evaluate the argument of the method as an XPath and return the number of results.
|
|
return count($this->_evaluateExpr($arguments, $context));
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function id.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_id($arguments, $context) {
|
|
$arguments = trim($arguments); // Trim the arguments.
|
|
$arguments = explode(' ', $arguments); // Now split the arguments into an array.
|
|
// Create a list of nodes.
|
|
$resultXPaths = array();
|
|
// Run through all nodes of the document.
|
|
$keys = array_keys($this->nodeIndex);
|
|
$kSize = $sizeOf($keys);
|
|
for ($i=0; $i<$kSize; $i++) {
|
|
if (empty($keys[$i])) continue; // skip super-Root
|
|
if (in_array($this->nodeIndex[$keys[$i]]['attributes']['id'], $arguments)) {
|
|
$resultXPaths[] = $context['nodePath']; // Add this node to the list of nodes.
|
|
}
|
|
}
|
|
return $resultXPaths; // Return the list of nodes.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function name.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_name($arguments, $context) {
|
|
// If the argument it omitted, it defaults to a node-set with the context node as its only member.
|
|
if (empty($arguments)) {
|
|
return $this->_addLiteral($this->nodeIndex[$context['nodePath']]['name']);
|
|
}
|
|
|
|
// Evaluate the argument to get a node set.
|
|
$nodeSet = $this->_evaluateExpr($arguments, $context);
|
|
if (!is_array($nodeSet)) return '';
|
|
if (count($nodeSet) < 1) return '';
|
|
if (!isset($this->nodeIndex[$nodeSet[0]])) return '';
|
|
|
|
// Return a reference to the name of the node.
|
|
return $this->_addLiteral($this->nodeIndex[$nodeSet[0]]['name']);
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function string.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_string($arguments, $context) {
|
|
// Check what type of parameter is given
|
|
if (is_array($arguments)) {
|
|
// Get the value of the first result (which means we want to concat all the text...unless
|
|
// a specific text() node has been given, and it will switch off to substringData
|
|
if (!count($arguments)) $result = '';
|
|
else $result = $this->wholeText($arguments[0]);
|
|
}
|
|
// Is it a literal string?
|
|
elseif (preg_match('/^[0-9]+(\.[0-9]+)?$/', $arguments) OR preg_match('/^\.[0-9]+$/', $arguments)) {
|
|
$number = doubleval($arguments); // Convert the digits to a number.
|
|
$result = strval($number); // Return the number.
|
|
}
|
|
elseif (is_bool($arguments)) { // Check whether it's TRUE or FALSE and return as string.
|
|
if ($arguments === TRUE) $result = 'TRUE'; else $result = 'FALSE';
|
|
}
|
|
// a string is true if and only if its length is non-zero
|
|
elseif (($literal = $this->_asLiteral($arguments)) !== FALSE) {
|
|
return $literal;
|
|
}
|
|
elseif (!empty($arguments)) {
|
|
// Use the argument as an XPath.
|
|
$result = $this->_evaluateExpr($arguments, $context);
|
|
$result = $this->_handleFunction_string($result, $context);
|
|
}
|
|
else {
|
|
$result = ''; // Return an empty string.
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function concat.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_concat($arguments, $context) {
|
|
// Split the arguments.
|
|
$arguments = explode(',', $arguments);
|
|
// Run through each argument and evaluate it.
|
|
$size = sizeof($arguments);
|
|
for ($i=0; $i<$size; $i++) {
|
|
$arguments[$i] = trim($arguments[$i]); // Trim each argument.
|
|
// Evaluate it.
|
|
$arguments[$i] = $this->_handleFunction_string($arguments[$i], $context);
|
|
}
|
|
$arguments = implode('', $arguments); // Put the string together and return it.
|
|
return $this->_addLiteral($arguments);
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function starts-with.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_starts_with($arguments, $context) {
|
|
// Get the arguments.
|
|
$first = trim($this->_prestr($arguments, ','));
|
|
$second = trim($this->_afterstr($arguments, ','));
|
|
// Evaluate each argument.
|
|
$first = $this->_handleFunction_string($first, $context);
|
|
$second = $this->_handleFunction_string($second, $context);
|
|
// Check whether the first string starts with the second one.
|
|
return (bool) ereg('^'.$second, $first);
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function contains.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_contains($arguments, $context) {
|
|
// Get the arguments.
|
|
$first = trim($this->_prestr($arguments, ','));
|
|
$second = trim($this->_afterstr($arguments, ','));
|
|
//echo "Predicate: $arguments First: ".$first." Second: ".$second."\n";
|
|
// Evaluate each argument.
|
|
$first = $this->_handleFunction_string($first, $context);
|
|
$second = $this->_handleFunction_string($second, $context);
|
|
//echo $second.": ".$first."\n";
|
|
// If the search string is null, then the provided there is a value it will contain it as
|
|
// it is considered that all strings contain the empty string. ## N.S.
|
|
if ($second==='') return TRUE;
|
|
// Check whether the first string starts with the second one.
|
|
if (strpos($first, $second) === FALSE) {
|
|
return FALSE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function substring-before.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_substring_before($arguments, $context) {
|
|
// Get the arguments.
|
|
$first = trim($this->_prestr($arguments, ','));
|
|
$second = trim($this->_afterstr($arguments, ','));
|
|
// Evaluate each argument.
|
|
$first = $this->_handleFunction_string($first, $context);
|
|
$second = $this->_handleFunction_string($second, $context);
|
|
// Return the substring.
|
|
return $this->_addLiteral($this->_prestr(strval($first), strval($second)));
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function substring-after.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_substring_after($arguments, $context) {
|
|
// Get the arguments.
|
|
$first = trim($this->_prestr($arguments, ','));
|
|
$second = trim($this->_afterstr($arguments, ','));
|
|
// Evaluate each argument.
|
|
$first = $this->_handleFunction_string($first, $context);
|
|
$second = $this->_handleFunction_string($second, $context);
|
|
// Return the substring.
|
|
return $this->_addLiteral($this->_afterstr(strval($first), strval($second)));
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function substring.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_substring($arguments, $context) {
|
|
// Split the arguments.
|
|
$arguments = explode(",", $arguments);
|
|
$size = sizeOf($arguments);
|
|
for ($i=0; $i<$size; $i++) { // Run through all arguments.
|
|
$arguments[$i] = trim($arguments[$i]); // Trim the string.
|
|
// Evaluate each argument.
|
|
$arguments[$i] = $this->_handleFunction_string($arguments[$i], $context);
|
|
}
|
|
// Check whether a third argument was given and return the substring..
|
|
if (!empty($arguments[2])) {
|
|
return $this->_addLiteral(substr(strval($arguments[0]), $arguments[1] - 1, $arguments[2]));
|
|
} else {
|
|
return $this->_addLiteral(substr(strval($arguments[0]), $arguments[1] - 1));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function string-length.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_string_length($arguments, $context) {
|
|
$arguments = trim($arguments); // Trim the argument.
|
|
// Evaluate the argument.
|
|
$arguments = $this->_handleFunction_string($arguments, $context);
|
|
return strlen(strval($arguments)); // Return the length of the string.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function normalize-space.
|
|
*
|
|
* The normalize-space function returns the argument string with whitespace
|
|
* normalized by stripping leading and trailing whitespace and replacing sequences
|
|
* of whitespace characters by a single space.
|
|
* If the argument is omitted, it defaults to the context node converted to a string,
|
|
* in other words the string-value of the context node
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (stri)g trimed string
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_normalize_space($arguments, $context) {
|
|
if (empty($arguments)) {
|
|
$arguments = $this->getParentXPath($context['nodePath']).'/'.$this->nodeIndex[$context['nodePath']]['name'].'['.$this->nodeIndex[$context['nodePath']]['contextPos'].']';
|
|
} else {
|
|
$arguments = $this->_handleFunction_string($arguments, $context);
|
|
}
|
|
$arguments = trim(preg_replace (";[[:space:]]+;s",' ',$arguments));
|
|
return $this->_addLiteral($arguments);
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function translate.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_translate($arguments, $context) {
|
|
$arguments = explode(',', $arguments); // Split the arguments.
|
|
$size = sizeOf($arguments);
|
|
for ($i=0; $i<$size; $i++) { // Run through all arguments.
|
|
$arguments[$i] = trim($arguments[$i]); // Trim the argument.
|
|
// Evaluate the argument.
|
|
$arguments[$i] = $this->_handleFunction_string($arguments[$i], $context);
|
|
}
|
|
// Return the translated string.
|
|
return $this->_addLiteral(strtr($arguments[0], $arguments[1], $arguments[2]));
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function boolean.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_boolean($arguments, $context) {
|
|
if (empty($arguments)) {
|
|
return FALSE; // Sorry, there were no arguments.
|
|
}
|
|
// a bool is dead obvious
|
|
elseif (is_bool($arguments)) {
|
|
return $arguments;
|
|
}
|
|
// a node-set is true if and only if it is non-empty
|
|
elseif (is_array($arguments)) {
|
|
return (count($arguments) > 0);
|
|
}
|
|
// a number is true if and only if it is neither positive or negative zero nor NaN
|
|
// (Straight out of the XPath spec.. makes no sense?????)
|
|
elseif (preg_match('/^[0-9]+(\.[0-9]+)?$/', $arguments) || preg_match('/^\.[0-9]+$/', $arguments)) {
|
|
$number = doubleval($arguments); // Convert the digits to a number.
|
|
// If number zero return FALSE else TRUE.
|
|
if ($number == 0) return FALSE; else return TRUE;
|
|
}
|
|
// a string is true if and only if its length is non-zero
|
|
elseif (($literal = $this->_asLiteral($arguments)) !== FALSE) {
|
|
return (strlen($literal) != 0);
|
|
}
|
|
// an object of a type other than the four basic types is converted to a boolean in a
|
|
// way that is dependent on that type
|
|
else {
|
|
// Try to evaluate the argument as an XPath.
|
|
$result = $this->_evaluateExpr($arguments, $context);
|
|
if (is_string($result) && is_string($arguments) && (!strcmp($result, $arguments))) {
|
|
$this->_displayError("Loop detected in XPath expression. Probably an internal error :o/. _handleFunction_boolean($result)", __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
} else {
|
|
return $this->_handleFunction_boolean($result, $context);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function not.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_not($arguments, $context) {
|
|
// Return the negative value of the content of the brackets.
|
|
$bArgResult = $this->_handleFunction_boolean($arguments, $context);
|
|
//echo "Before inversion: ".($bArgResult?"TRUE":"FALSE")."\n";
|
|
return !$bArgResult;
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function TRUE.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_true($arguments, $context) {
|
|
return TRUE; // Return TRUE.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function FALSE.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_false($arguments, $context) {
|
|
return FALSE; // Return FALSE.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function lang.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_lang($arguments, $context) {
|
|
$arguments = trim($arguments); // Trim the arguments.
|
|
$currentNode = $this->nodeIndex[$context['nodePath']];
|
|
while (!empty($currentNode['name'])) { // Run through the ancestors.
|
|
// Check whether the node has an language attribute.
|
|
if (isSet($currentNode['attributes']['xml:lang'])) {
|
|
// Check whether it's the language, the user asks for; if so return TRUE else FALSE
|
|
return eregi('^'.$arguments, $currentNode['attributes']['xml:lang']);
|
|
}
|
|
$currentNode = $currentNode['parentNode']; // Move up to parent
|
|
} // End while
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function number.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_number($arguments, $context) {
|
|
// Check the type of argument.
|
|
|
|
// A string that is a number
|
|
if (is_numeric($arguments)) {
|
|
return doubleval($arguments); // Return the argument as a number.
|
|
}
|
|
// A bool
|
|
elseif (is_bool($arguments)) { // Return TRUE/FALSE as a number.
|
|
if ($arguments === TRUE) return 1; else return 0;
|
|
}
|
|
// A node set
|
|
elseif (is_array($arguments)) {
|
|
// Is converted to a string then handled like a string
|
|
$string = $this->_handleFunction_string($arguments, $context);
|
|
if (is_numeric($string))
|
|
return doubleval($string);
|
|
}
|
|
else {
|
|
// Try to evaluate the argument as an XPath.
|
|
$result = $this->_evaluateExpr($arguments, $context);
|
|
return $this->_handleFunction_number($result, $context);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function sum.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_sum($arguments, $context) {
|
|
$arguments = trim($arguments); // Trim the arguments.
|
|
// Evaluate the arguments as an XPath query.
|
|
$result = $this->_handleFunction_number($arguments, $context);
|
|
$sum = 0; // Create a variable to save the sum.
|
|
// Run through all results.
|
|
$size = sizeOf($result);
|
|
for ($i=0; $i<$size; $i++) {
|
|
$value = $this->substringData($result[$i]); // Get the value of the node.
|
|
$sum += doubleval($value); // Add it to the sum.
|
|
}
|
|
return $sum; // Return the sum.
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function floor.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_floor($arguments, $context) {
|
|
if (!is_numeric($arguments)) {
|
|
$arguments = $this->_handleFunction_number($arguments, $context);
|
|
}
|
|
$arguments = doubleval($arguments); // Convert the arguments to a number.
|
|
return floor($arguments); // Return the result
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function ceiling.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_ceiling($arguments, $context) {
|
|
if (!is_numeric($arguments)) {
|
|
$arguments = $this->_handleFunction_number($arguments, $context);
|
|
}
|
|
$arguments = doubleval($arguments); // Convert the arguments to a number.
|
|
return ceil($arguments); // Return the result
|
|
}
|
|
|
|
/**
|
|
* Handles the XPath function round.
|
|
*
|
|
* @param $arguments (string) String containing the arguments that were passed to the function.
|
|
* @param $context (array) The context from which to evaluate the function
|
|
* @return (mixed) Depending on the type of function being processed
|
|
* @see evaluate()
|
|
*/
|
|
function _handleFunction_round($arguments, $context) {
|
|
if (!is_numeric($arguments)) {
|
|
$arguments = $this->_handleFunction_number($arguments, $context);
|
|
}
|
|
$arguments = doubleval($arguments); // Convert the arguments to a number.
|
|
return round($arguments); // Return the result
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPathEngine ------ Help Stuff ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Compare two nodes to see if they are equal (point to the same node in the doc)
|
|
*
|
|
* 2 nodes are considered equal if the absolute XPath is equal.
|
|
*
|
|
* @param $node1 (mixed) Either an absolute XPath to an node OR a real tree-node (hash-array)
|
|
* @param $node2 (mixed) Either an absolute XPath to an node OR a real tree-node (hash-array)
|
|
* @return (bool) TRUE if equal (see text above), FALSE if not (and on error).
|
|
*/
|
|
function equalNodes($node1, $node2) {
|
|
$xPath_1 = is_string($node1) ? $node1 : $this->getNodePath($node1);
|
|
$xPath_2 = is_string($node2) ? $node2 : $this->getNodePath($node2);
|
|
return (strncasecmp ($xPath_1, $xPath_2, strLen($xPath_1)) == 0);
|
|
}
|
|
|
|
/**
|
|
* Get the absolute XPath of a node that is in a document tree.
|
|
*
|
|
* @param $node (array) A real tree-node (hash-array)
|
|
* @return (string) The string path to the node or FALSE on error.
|
|
*/
|
|
function getNodePath($node) {
|
|
if (!empty($node['xpath'])) return $node['xpath'];
|
|
$pathInfo = array();
|
|
do {
|
|
if (empty($node['name']) OR empty($node['parentNode'])) break; // End criteria
|
|
$pathInfo[] = array('name' => $node['name'], 'contextPos' => $node['contextPos']);
|
|
$node = $node['parentNode'];
|
|
} while (TRUE);
|
|
|
|
$xPath = '';
|
|
for ($i=sizeOf($pathInfo)-1; $i>=0; $i--) {
|
|
$xPath .= '/' . $pathInfo[$i]['name'] . '[' . $pathInfo[$i]['contextPos'] . ']';
|
|
}
|
|
if (empty($xPath)) return FALSE;
|
|
return $xPath;
|
|
}
|
|
|
|
/**
|
|
* Retrieves the absolute parent XPath query.
|
|
*
|
|
* The parents stored in the tree are only relative parents...but all the parent
|
|
* information is stored in the XPath query itself...so instead we use a function
|
|
* to extract the parent from the absolute Xpath query
|
|
*
|
|
* @param $childPath (string) String containing an absolute XPath query
|
|
* @return (string) returns the absolute XPath of the parent
|
|
*/
|
|
function getParentXPath($absoluteXPath) {
|
|
$lastSlashPos = strrpos($absoluteXPath, '/');
|
|
if ($lastSlashPos == 0) { // it's already the root path
|
|
return ''; // 'super-root'
|
|
} else {
|
|
return (substr($absoluteXPath, 0, $lastSlashPos));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns TRUE if the given node has child nodes below it
|
|
*
|
|
* @param $absoluteXPath (string) full path of the potential parent node
|
|
* @return (bool) TRUE if this node exists and has a child, FALSE otherwise
|
|
*/
|
|
function hasChildNodes($absoluteXPath) {
|
|
return (bool) (isSet($this->nodeIndex[$absoluteXPath])
|
|
AND sizeOf($this->nodeIndex[$absoluteXPath]['childNodes']));
|
|
}
|
|
|
|
/**
|
|
* Translate all ampersands to it's literal entities '&' and back.
|
|
*
|
|
* I wasn't aware of this problem at first but it's important to understand why we do this.
|
|
* At first you must know:
|
|
* a) PHP's XML parser *translates* all entities to the equivalent char E.g. < is returned as '<'
|
|
* b) PHP's XML parser (in V 4.1.0) has problems with most *literal* entities! The only one's that are
|
|
* recognized are &, < > and ". *ALL* others (like © a.s.o.) cause an
|
|
* XML_ERROR_UNDEFINED_ENTITY error. I reported this as bug at http://bugs.php.net/bug.php?id=15092
|
|
* (It turned out not to be a 'real' bug, but one of those nice W3C-spec things).
|
|
*
|
|
* Forget position b) now. It's just for info. Because the way we will solve a) will also solve b) too.
|
|
*
|
|
* THE PROBLEM
|
|
* To understand the problem, here a sample:
|
|
* Given is the following XML: "<AAA> < > </AAA>"
|
|
* Try to parse it and PHP's XML parser will fail with a XML_ERROR_UNDEFINED_ENTITY becaus of
|
|
* the unknown litteral-entity ' '. (The numeric equivalent ' ' would work though).
|
|
* Next try is to use the numeric equivalent 160 for ' ', thus "<AAA> <   > </AAA>"
|
|
* The data we receive in the tag <AAA> is " < > ". So we get the *translated entities* and
|
|
* NOT the 3 entities <   >. Thus, we will not even notice that there were entities at all!
|
|
* In *most* cases we're not able to tell if the data was given as entity or as 'normal' char.
|
|
* E.g. When receiving a quote or a single space were not able to tell if it was given as 'normal' char
|
|
* or as or ". Thus we loose the entity-information of the XML-data!
|
|
*
|
|
* THE SOLUTION
|
|
* The better solution is to keep the data 'as is' by replacing the '&' before parsing begins.
|
|
* E.g. Taking the original input from above, this would result in "<AAA> &lt; &nbsp; &gt; </AAA>"
|
|
* The data we receive now for the tag <AAA> is " < > ". and that's what we want.
|
|
*
|
|
* The bad thing is, that a global replace will also replace data in section that are NOT translated by the
|
|
* PHP XML-parser. That is comments (<!-- -->), IP-sections (stuff between <? ? >) and CDATA-block too.
|
|
* So all data comming from those sections must be reversed. This is done during the XML parse phase.
|
|
* So:
|
|
* a) Replacement of all '&' in the XML-source.
|
|
* b) All data that is not char-data or in CDATA-block have to be reversed during the XML-parse phase.
|
|
*
|
|
* @param $xmlSource (string) The XML string
|
|
* @return (string) The XML string with translated ampersands.
|
|
*/
|
|
function _translateAmpersand($xmlSource, $reverse=FALSE) {
|
|
return ($reverse ? str_replace('&', '&', $xmlSource) : str_replace('&', '&', $xmlSource));
|
|
}
|
|
|
|
} // END OF CLASS XPathEngine
|
|
|
|
|
|
/************************************************************************************************
|
|
* ===============================================================================================
|
|
* X P a t h - Class
|
|
* ===============================================================================================
|
|
************************************************************************************************/
|
|
|
|
define('XPATH_QUERYHIT_ALL' , 1);
|
|
define('XPATH_QUERYHIT_FIRST' , 2);
|
|
define('XPATH_QUERYHIT_UNIQUE', 3);
|
|
|
|
class XPath extends XPathEngine {
|
|
|
|
/**
|
|
* Constructor of the class
|
|
*
|
|
* Optionally you may call this constructor with the XML-filename to parse and the
|
|
* XML option vector. A option vector sample:
|
|
* $xmlOpt = array(XML_OPTION_CASE_FOLDING => FALSE, XML_OPTION_SKIP_WHITE => TRUE);
|
|
*
|
|
* @param $userXmlOptions (array) (optional) Vector of (<optionID>=><value>, <optionID>=><value>, ...)
|
|
* @param $fileName (string) (optional) Filename of XML file to load from.
|
|
* It is recommended that you call importFromFile()
|
|
* instead as you will get an error code. If the
|
|
* import fails, the object will be set to FALSE.
|
|
* @see parent::XPathEngine()
|
|
*/
|
|
function XPath($fileName='', $userXmlOptions=array()) {
|
|
parent::XPathEngine($userXmlOptions);
|
|
$this->properties['modMatch'] = XPATH_QUERYHIT_ALL;
|
|
if ($fileName) {
|
|
if (!$this->importFromFile($fileName)) {
|
|
$this = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Resets the object so it's able to take a new xml sting/file
|
|
*
|
|
* Constructing objects is slow. If you can, reuse ones that you have used already
|
|
* by using this reset() function.
|
|
*/
|
|
function reset() {
|
|
parent::reset();
|
|
$this->properties['modMatch'] = XPATH_QUERYHIT_ALL;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ Get / Set Stuff ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Resolves and xPathQuery array depending on the property['modMatch']
|
|
*
|
|
* Most of the modification functions of XPath will also accept a xPathQuery (instead
|
|
* of an absolute Xpath). The only problem is that the query could match more the one
|
|
* node. The question is, if the none, the fist or all nodes are to be modified.
|
|
* The behaver can be set with setModMatch()
|
|
*
|
|
* @param $modMatch (int) One of the following:
|
|
* - XPATH_QUERYHIT_ALL (default)
|
|
* - XPATH_QUERYHIT_FIRST
|
|
* - XPATH_QUERYHIT_UNIQUE // If the query matches more then one node.
|
|
* @see _resolveXPathQuery()
|
|
*/
|
|
function setModMatch($modMatch = XPATH_QUERYHIT_ALL) {
|
|
switch($modMatch) {
|
|
case XPATH_QUERYHIT_UNIQUE : $this->properties['modMatch'] = XPATH_QUERYHIT_UNIQUE; break;
|
|
case XPATH_QUERYHIT_FIRST: $this->properties['modMatch'] = XPATH_QUERYHIT_FIRST; break;
|
|
default: $this->properties['modMatch'] = XPATH_QUERYHIT_ALL;
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ DOM Like Modification ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ Child (Node) Set/Get ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieves the name(s) of a node or a group of document nodes.
|
|
*
|
|
* This method retrieves the names of a group of document nodes
|
|
* specified in the argument. So if the argument was '/A[1]/B[2]' then it
|
|
* would return 'B' if the node did exist in the tree.
|
|
*
|
|
* @param $xPathQuery (mixed) Array or single full document path(s) of the node(s),
|
|
* from which the names should be retrieved.
|
|
* @return (mixed) Array or single string of the names of the specified
|
|
* nodes, or just the individual name. If the node did
|
|
* not exist, then returns FALSE.
|
|
*/
|
|
function nodeName($xPathQuery) {
|
|
if (is_array($xPathQuery)) {
|
|
$xPathSet = $xPathQuery;
|
|
} else {
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'nodeName');
|
|
}
|
|
if (count($xPathSet) == 0) return FALSE;
|
|
// For each node, get it's name
|
|
$result = array();
|
|
foreach($xPathSet as $xPath) {
|
|
$node = &$this->getNode($xPath);
|
|
if (!$node) {
|
|
// ### Fatal internal error??
|
|
continue;
|
|
}
|
|
$result[] = $node['name'];
|
|
}
|
|
// If just a single string, return string
|
|
if (count($xPathSet) == 1) $result = $result[0];
|
|
// Return result.
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Removes a node from the XML document.
|
|
*
|
|
* This method removes a node from the tree of nodes of the XML document. If the node
|
|
* is a document node, all children of the node and its character data will be removed.
|
|
* If the node is an attribute node, only this attribute will be removed, the node to which
|
|
* the attribute belongs as well as its children will remain unmodified.
|
|
*
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $autoReindex (bool) (optional, default=TRUE) Reindex the document to reflect
|
|
* the changes. A performance helper. See reindexNodeTree()
|
|
* @return (bool) TRUE on success, FALSE on error;
|
|
* @see setModMatch(), reindexNodeTree()
|
|
*/
|
|
function removeChild($xPathQuery, $autoReindex=TRUE) {
|
|
$NULL = NULL;
|
|
$bDebugThisFunction = FALSE; // Get diagnostic output for this function
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction('removeChild');
|
|
echo "Node: $xPathQuery\n";
|
|
echo '<hr>';
|
|
}
|
|
$status = FALSE;
|
|
do { // try-block
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'removeChild');
|
|
if (sizeOf($xPathSet) === 0) {
|
|
$this->_displayError(sprintf($this->errorStrings['NoNodeMatch'], $xPathQuery), __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
$mustReindex = FALSE;
|
|
// Make chages from 'bottom-up'. In this manner the modifications will not affect itself.
|
|
for ($i=sizeOf($xPathSet)-1; $i>=0; $i--) {
|
|
$absoluteXPath = $xPathSet[$i];
|
|
if (preg_match(';/attribute::;', $absoluteXPath)) { // Handle the case of an attribute node
|
|
$xPath = $this->_prestr($absoluteXPath, '/attribute::'); // Get the path to the attribute node's parent.
|
|
$attribute = $this->_afterstr($absoluteXPath, '/attribute::'); // Get the name of the attribute.
|
|
unSet($this->nodeIndex[$xPath]['attributes'][$attribute]); // Unset the attribute
|
|
if ($bDebugThisFunction) echo "We removed the attribute '$attribute' of node '$xPath'.\n";
|
|
continue;
|
|
}
|
|
// Otherwise remove the node by setting it to NULL. It will be removed on the next reindexNodeTree() call.
|
|
$mustReindex = $autoReindex;
|
|
$theNode = $this->nodeIndex[$absoluteXPath];
|
|
$theNode['parentNode']['childNodes'][$theNode['pos']] =& $NULL;
|
|
if ($bDebugThisFunction) echo "We removed the node '$absoluteXPath'.\n";
|
|
}
|
|
// Reindex the node tree again
|
|
if ($mustReindex) $this->reindexNodeTree();
|
|
$status = TRUE;
|
|
} while(FALSE);
|
|
|
|
if ($bDebugThisFunction) $this->_closeDebugFunction($aStartTime, $status);
|
|
return $status;
|
|
}
|
|
|
|
/**
|
|
* Replace a node with any data string. The $data is taken 1:1.
|
|
*
|
|
* This function will delete the node you define by $absoluteXPath (plus it's sub-nodes) and
|
|
* substitute it by the string $text. Often used to push in not well formed HTML.
|
|
* WARNING:
|
|
* The $data is taken 1:1.
|
|
* You are in charge that the data you enter is valid XML if you intend
|
|
* to export and import the content again.
|
|
*
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $data (string) String containing the content to be set. *READONLY*
|
|
* @param $autoReindex (bool) (optional, default=TRUE) Reindex the document to reflect
|
|
* the changes. A performance helper. See reindexNodeTree()
|
|
* @return (bool) TRUE on success, FALSE on error;
|
|
* @see setModMatch(), replaceChild(), reindexNodeTree()
|
|
*/
|
|
function replaceChildByData($xPathQuery, $data, $autoReindex=TRUE) {
|
|
$NULL = NULL;
|
|
$bDebugThisFunction = FALSE; // Get diagnostic output for this function
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction('replaceChildByData');
|
|
echo "Node: $xPathQuery\n";
|
|
}
|
|
$status = FALSE;
|
|
do { // try-block
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'replaceChildByData');
|
|
if (sizeOf($xPathSet) === 0) {
|
|
$this->_displayError(sprintf($this->errorStrings['NoNodeMatch'], $xPathQuery), __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
$mustReindex = FALSE;
|
|
// Make chages from 'bottom-up'. In this manner the modifications will not affect itself.
|
|
for ($i=sizeOf($xPathSet)-1; $i>=0; $i--) {
|
|
$absoluteXPath = $xPathSet[$i];
|
|
$mustReindex = $autoReindex;
|
|
$theNode = $this->nodeIndex[$absoluteXPath];
|
|
$pos = $theNode['pos'];
|
|
$theNode['parentNode']['textParts'][$pos] .= $data;
|
|
$theNode['parentNode']['childNodes'][$pos] =& $NULL;
|
|
if ($bDebugThisFunction) echo "We replaced the node '$absoluteXPath' with data.\n";
|
|
}
|
|
// Reindex the node tree again
|
|
if ($mustReindex) $this->reindexNodeTree();
|
|
$status = TRUE;
|
|
} while(FALSE);
|
|
|
|
if ($bDebugThisFunction) $this->_closeDebugFunction($aStartTime, ($status) ? 'Success' : '!!! FAILD !!!');
|
|
return $status;
|
|
}
|
|
|
|
/**
|
|
* Replace the node(s) that matches the xQuery with the passed node (or passed node-tree)
|
|
*
|
|
* If the passed node is a string it's assumed to be XML and replaceChildByXml()
|
|
* will be called.
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) Xpath to the node being replaced.
|
|
* @param $node (mixed) String or Array (Usually a String)
|
|
* If string: Vaild XML. E.g. "<A/>" or "<A> foo <B/> bar <A/>"
|
|
* If array: A Node (can be a whole sub-tree) (See comment in header)
|
|
* @param $autoReindex (bool) (optional, default=TRUE) Reindex the document to reflect
|
|
* the changes. A performance helper. See reindexNodeTree()
|
|
* @return (array) The last replaced $node (can be a whole sub-tree)
|
|
* @see reindexNodeTree()
|
|
*/
|
|
function &replaceChild($xPathQuery, $node, $autoReindex=TRUE) {
|
|
$NULL = NULL;
|
|
if (is_string($node)) {
|
|
if (!($node = $this->_xml2Document($node))) return FALSE;
|
|
}
|
|
// Special case if it's 'super root'. We then have to take the child node == top node
|
|
if (empty($node['name'])) $node = $node['childNodes'][0];
|
|
|
|
$status = FALSE;
|
|
do { // try-block
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'replaceChild');
|
|
if (sizeOf($xPathSet) === 0) {
|
|
$this->_displayError(sprintf($this->errorStrings['NoNodeMatch'], $xPathQuery), __LINE__, __FILE__, FALSE);
|
|
break; // try-block
|
|
}
|
|
$mustReindex = FALSE;
|
|
// Make chages from 'bottom-up'. In this manner the modifications will not affect itself.
|
|
for ($i=sizeOf($xPathSet)-1; $i>=0; $i--) {
|
|
$absoluteXPath = $xPathSet[$i];
|
|
$mustReindex = $autoReindex;
|
|
$childNode =& $this->nodeIndex[$absoluteXPath];
|
|
$parentNode =& $childNode['parentNode'];
|
|
$childNode['parentNode'] =& $NULL;
|
|
$childPos = $childNode['pos'];
|
|
$parentNode['childNodes'][$childPos] =& $this->cloneNode($node);
|
|
}
|
|
if ($mustReindex) $this->reindexNodeTree();
|
|
$status = TRUE;
|
|
} while(FALSE);
|
|
|
|
if (!$status) return FALSE;
|
|
return $childNode;
|
|
}
|
|
|
|
/**
|
|
* Insert passed node (or passed node-tree) at the node(s) that matches the xQuery.
|
|
*
|
|
* With parameters you can define if the 'hit'-node is shifted to the right or left
|
|
* and if it's placed before of after the text-part.
|
|
* Per derfault the 'hit'-node is shifted to the right and the node takes the place
|
|
* the of the 'hit'-node.
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* E.g. Following is given: AAA[1]
|
|
* / \
|
|
* ..BBB[1]..BBB[2] ..
|
|
*
|
|
* a) insertChild('/AAA[1]/BBB[2]', <node CCC>)
|
|
* b) insertChild('/AAA[1]/BBB[2]', <node CCC>, $shiftRight=FALSE)
|
|
* c) insertChild('/AAA[1]/BBB[2]', <node CCC>, $shiftRight=FALSE, $afterText=FALSE)
|
|
*
|
|
* a) b) c)
|
|
* AAA[1] AAA[1] AAA[1]
|
|
* / | \ / | \ / | \
|
|
* ..BBB[1]..CCC[1]BBB[2].. ..BBB[1]..BBB[2]..CCC[1] ..BBB[1]..BBB[2]CCC[1]..
|
|
*
|
|
* #### Do a complete review of the "(optional)" tag after several arguments.
|
|
*
|
|
* @param $xPathQuery (string) Xpath to the node to append.
|
|
* @param $node (mixed) String or Array (Usually a String)
|
|
* If string: Vaild XML. E.g. "<A/>" or "<A> foo <B/> bar <A/>"
|
|
* If array: A Node (can be a whole sub-tree) (See comment in header)
|
|
* @param $shiftRight (bool) (optional, default=TRUE) Shift the target node to the right.
|
|
* @param $afterText (bool) (optional, default=TRUE) Insert after the text.
|
|
* @param $autoReindex (bool) (optional, default=TRUE) Reindex the document to reflect
|
|
* the changes. A performance helper. See reindexNodeTree()
|
|
* @return (mixed) FALSE on error (or no match). On success we return the path(s) to the newly
|
|
* appended nodes. That is: Array of paths if more then 1 node was added or
|
|
* a single path string if only one node was added.
|
|
* NOTE: If autoReindex is FALSE, then we can't return the *complete* path
|
|
* as the exact doc-pos isn't available without reindexing. In that case we leave
|
|
* out the last [docpos] in the path(s). ie we'd return /A[3]/B instead of /A[3]/B[2]
|
|
* @see appendChildByXml(), reindexNodeTree()
|
|
*/
|
|
function insertChild($xPathQuery, $node, $shiftRight=TRUE, $afterText=TRUE, $autoReindex=TRUE) {
|
|
if (is_string($node)) {
|
|
if (!($node = $this->_xml2Document($node))) return FALSE;
|
|
}
|
|
// Special case if it's 'super root'. We then have to take the child node == top node
|
|
if (empty($node['name'])) $node = $node['childNodes'][0];
|
|
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'appendChild');
|
|
if (sizeOf($xPathSet) === 0) {
|
|
$this->_displayError(sprintf($this->errorStrings['NoNodeMatch'], $xPathQuery), __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
$mustReindex = FALSE;
|
|
$newNodes = array();
|
|
$result = array();
|
|
// Make chages from 'bottom-up'. In this manner the modifications will not affect itself.
|
|
for ($i=sizeOf($xPathSet)-1; $i>=0; $i--) {
|
|
$absoluteXPath = $xPathSet[$i];
|
|
$mustReindex = $autoReindex;
|
|
$childNode =& $this->nodeIndex[$absoluteXPath];
|
|
$parentNode =& $childNode['parentNode'];
|
|
//Special case: It not possible to add siblings to the top node.
|
|
if (empty($parentNode['name'])) continue;
|
|
$newNode =& $this->cloneNode($node);
|
|
$pos = $shiftRight ? $childNode['pos'] : $childNode['pos']+1;
|
|
$parentNode['childNodes'] = array_merge(
|
|
array_slice($parentNode['childNodes'], 0, $pos),
|
|
array($newNode),
|
|
array_slice($parentNode['childNodes'], $pos)
|
|
);
|
|
$pos += $afterText ? 1 : 0;
|
|
$parentNode['textParts'] = array_merge(
|
|
array_slice($parentNode['textParts'], 0, $pos),
|
|
'',
|
|
array_slice($parentNode['textParts'], $pos)
|
|
);
|
|
|
|
// We are going from bottom to top, but the user will want results from top to bottom.
|
|
if ($mustReindex) {
|
|
// We'll have to wait till after the reindex to get the full path to this new node.
|
|
$newNodes[] = &$newNode;
|
|
} else {
|
|
// If we are reindexing the tree later, then we can't return the user any
|
|
// useful results, so we just return them the count.
|
|
array_unshift($result, "$absoluteXPath/{$newNode['name']}");
|
|
}
|
|
}
|
|
if ($mustReindex) {
|
|
$this->reindexNodeTree();
|
|
// Now we must fill in the result array. Because until now we did not
|
|
// know what contextpos our newly added entries had, just their pos within
|
|
// the siblings.
|
|
foreach ($newNodes as $newNode) {
|
|
array_unshift($result, $newNode['xpath']);
|
|
}
|
|
}
|
|
if (count($result) == 1) $result = $result[0];
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Appends a child to anothers children.
|
|
*
|
|
* If you intend to do a lot of appending, you should leave autoIndex as FALSE
|
|
* and then call reindexNodeTree() when you are finished all the appending.
|
|
*
|
|
* @param $xPathQuery (string) Xpath to the node to append to.
|
|
* @param $node (mixed) String or Array (Usually a String)
|
|
* If string: Vaild XML. E.g. "<A/>" or "<A> foo <B/> bar <A/>"
|
|
* If array: A Node (can be a whole sub-tree) (See comment in header)
|
|
* @param $afterText (bool) (optional, default=FALSE) Insert after the text.
|
|
* @param $autoReindex (bool) (optional, default=TRUE) Reindex the document to reflect
|
|
* the changes. A performance helper. See reindexNodeTree()
|
|
* @return (mixed) FALSE on error (or no match). On success we return the path(s) to the newly
|
|
* appended nodes. That is: Array of paths if more then 1 node was added or
|
|
* a single path string if only one node was added.
|
|
* NOTE: If autoReindex is FALSE, then we can't return the *complete* path
|
|
* as the exact doc-pos isn't available without reindexing. In that case we leave
|
|
* out the last [docpos] in the path(s). ie we'd return /A[3]/B instead of /A[3]/B[2]
|
|
* @see insertChild(), reindexNodeTree()
|
|
*/
|
|
function appendChild($xPathQuery, $node, $afterText=FALSE, $autoReindex=TRUE) {
|
|
if (is_string($node)) {
|
|
if (!($node = $this->_xml2Document($node))) return FALSE;
|
|
}
|
|
// Special case if it's 'super root'. We then have to take the child node == top node
|
|
if (empty($node['name'])) $node = $node['childNodes'][0];
|
|
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'appendChild');
|
|
if (sizeOf($xPathSet) === 0) {
|
|
$this->_displayError(sprintf($this->errorStrings['NoNodeMatch'], $xPathQuery), __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
|
|
$mustReindex = FALSE;
|
|
$newNodes = array();
|
|
$result = array();
|
|
// Make chages from 'bottom-up'. In this manner the modifications will not affect itself.
|
|
for ($i=sizeOf($xPathSet)-1; $i>=0; $i--) {
|
|
$absoluteXPath = $xPathSet[$i];
|
|
$mustReindex = $autoReindex;
|
|
$parentNode =& $this->nodeIndex[$absoluteXPath];
|
|
$newNode =& $this->cloneNode($node);
|
|
$parentNode['childNodes'][] =& $newNode;
|
|
$pos = count($parentNode['textParts']);
|
|
$pos -= $afterText ? 0 : 1;
|
|
$parentNode['textParts'] = array_merge(
|
|
array_slice($parentNode['textParts'], 0, $pos),
|
|
'',
|
|
array_slice($parentNode['textParts'], $pos)
|
|
);
|
|
|
|
// We are going from bottom to top, but the user will want results from top to bottom.
|
|
if ($mustReindex) {
|
|
// We'll have to wait till after the reindex to get the full path to this new node.
|
|
$newNodes[] = &$newNode;
|
|
} else {
|
|
// If we are reindexing the tree later, then we can't return the user any
|
|
// useful results, so we just return them the count.
|
|
array_unshift($result, "$absoluteXPath/{$newNode['name']}");
|
|
}
|
|
}
|
|
if ($mustReindex) {
|
|
$this->reindexNodeTree();
|
|
// Now we must fill in the result array. Because until now we did not
|
|
// know what contextpos our newly added entries had, just their pos within
|
|
// the siblings.
|
|
foreach ($newNodes as $newNode) {
|
|
array_unshift($result, $newNode['xpath']);
|
|
}
|
|
}
|
|
if (count($result) == 1) $result = $result[0];
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Inserts a node before the reference node with the same parent.
|
|
*
|
|
* If you intend to do a lot of appending, you should leave autoIndex as FALSE
|
|
* and then call reindexNodeTree() when you are finished all the appending.
|
|
*
|
|
* @param $xPathQuery (string) Xpath to the node to insert new node before
|
|
* @param $node (mixed) String or Array (Usually a String)
|
|
* If string: Vaild XML. E.g. "<A/>" or "<A> foo <B/> bar <A/>"
|
|
* If array: A Node (can be a whole sub-tree) (See comment in header)
|
|
* @param $afterText (bool) (optional, default=FLASE) Insert after the text.
|
|
* @param $autoReindex (bool) (optional, default=TRUE) Reindex the document to reflect
|
|
* the changes. A performance helper. See reindexNodeTree()
|
|
* @return (mixed) FALSE on error (or no match). On success we return the path(s) to the newly
|
|
* appended nodes. That is: Array of paths if more then 1 node was added or
|
|
* a single path string if only one node was added.
|
|
* NOTE: If autoReindex is FALSE, then we can't return the *complete* path
|
|
* as the exact doc-pos isn't available without reindexing. In that case we leave
|
|
* out the last [docpos] in the path(s). ie we'd return /A[3]/B instead of /A[3]/B[2]
|
|
* @see reindexNodeTree()
|
|
*/
|
|
function insertBefore($xPathQuery, $node, $afterText=TRUE, $autoReindex=TRUE) {
|
|
return $this->insertChild($xPathQuery, $node, $shiftRight=TRUE, $afterText, $autoReindex);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ Attribute Set/Get ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieves a dedecated attribute value or a hash-array of all attributes of a node.
|
|
*
|
|
* The first param $absoluteXPath must be a valid xpath OR a xpath-query that results
|
|
* to *one* xpath. If the second param $attrName is not set, a hash-array of all attributes
|
|
* of that node is returned.
|
|
*
|
|
* Optionally you may pass an attrubute name in $attrName and the function will return the
|
|
* string value of that attribute.
|
|
*
|
|
* @param $absoluteXPath (string) Full xpath OR a xpath-query that results to *one* xpath.
|
|
* @param $attrName (string) (Optional) The name of the attribute. See above.
|
|
* @return (mixed) hash-array or a string of attributes depending if the
|
|
* parameter $attrName was set (see above). FALSE if the
|
|
* node or attribute couldn't be found.
|
|
* @see setAttribute(), removeAttribute()
|
|
*/
|
|
function getAttributes($absoluteXPath, $attrName=NULL) {
|
|
// Numpty check
|
|
if (!isSet($this->nodeIndex[$absoluteXPath])) {
|
|
$xPathSet = $this->_resolveXPathQuery($absoluteXPath,'getAttributes');
|
|
if (empty($xPathSet)) return FALSE;
|
|
// only use the first entry
|
|
$absoluteXPath = $xPathSet[0];
|
|
}
|
|
|
|
// Return the complete list or just the desired element
|
|
if (is_null($attrName)) {
|
|
return $this->nodeIndex[$absoluteXPath]['attributes'];
|
|
} elseif (isSet($this->nodeIndex[$absoluteXPath]['attributes'][$attrName])) {
|
|
return $this->nodeIndex[$absoluteXPath]['attributes'][$attrName];
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Set attributes of a node(s).
|
|
*
|
|
* This method sets a number single attributes. An existing attribute is overwritten (default)
|
|
* with the new value, but setting the last param to FALSE will prevent overwritten.
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $name (string) Attribute name.
|
|
* @param $value (string) Attribute value.
|
|
* @param $overwrite (bool) If the attribute is already set we overwrite it (see text above)
|
|
* @return (bool) TRUE on success, FALSE on failure.
|
|
* @see getAttribute(), removeAttribute()
|
|
*/
|
|
function setAttribute($xPathQuery, $name, $value, $overwrite=TRUE) {
|
|
return $this->setAttributes($xPathQuery, array($name => $value), $overwrite);
|
|
}
|
|
|
|
/**
|
|
* Version of setAttribute() that sets multiple attributes to node(s).
|
|
*
|
|
* This method sets a number of attributes. Existing attributes are overwritten (default)
|
|
* with the new values, but setting the last param to FALSE will prevent overwritten.
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $attributes (array) associative array of attributes to set.
|
|
* @param $overwrite (bool) If the attributes are already set we overwrite them (see text above)
|
|
* @return (bool) TRUE on success, FALSE otherwise
|
|
* @see setAttribute(), getAttribute(), removeAttribute()
|
|
*/
|
|
function setAttributes($xPathQuery, $attributes, $overwrite=TRUE) {
|
|
$status = FALSE;
|
|
do { // try-block
|
|
// The attributes parameter should be an associative array.
|
|
if (!is_array($attributes)) break; // try-block
|
|
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery,'setAttributes');
|
|
foreach($xPathSet as $absoluteXPath) {
|
|
// Add the attributes to the node.
|
|
$theNode =& $this->nodeIndex[$absoluteXPath];
|
|
if (empty($theNode['attributes'])) {
|
|
$this->nodeIndex[$absoluteXPath]['attributes'] = $attributes;
|
|
} else {
|
|
$theNode['attributes'] = $overwrite ? array_merge($theNode['attributes'],$attributes) : array_merge($attributes, $theNode['attributes']);
|
|
}
|
|
}
|
|
$status = TRUE;
|
|
} while(FALSE); // END try-block
|
|
|
|
return $status;
|
|
}
|
|
|
|
/**
|
|
* Removes an attribute of a node(s).
|
|
*
|
|
* This method removes *ALL* attributres per default unless the second parameter $attrList is set.
|
|
* $attrList can be either a single attr-name as string OR a vector of attr-names as array.
|
|
* E.g.
|
|
* removeAttribute(<xPath>); # will remove *ALL* attributes.
|
|
* removeAttribute(<xPath>, 'A'); # will only remove attributes called 'A'.
|
|
* removeAttribute(<xPath>, array('A_1','A_2')); # will remove attribute 'A_1' and 'A_2'.
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $attrList (mixed) (optional) if not set will delete *all* (see text above)
|
|
* @return (bool) TRUE on success, FALSE if the node couldn't be found
|
|
* @see getAttribute(), setAttribute()
|
|
*/
|
|
function removeAttribute($xPathQuery, $attrList=NULL) {
|
|
// Check for a valid xPathQuery
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery, 'removeAttribute');
|
|
|
|
if (!empty($attrList) AND is_string($attrList)) $attrList = array($attrList);
|
|
if (!is_array($attrList)) return FALSE;
|
|
|
|
foreach($xPathSet as $absoluteXPath) {
|
|
// If the attribute parameter wasn't set then remove all the attributes
|
|
if ($attrList[0] === NULL) {
|
|
$this->nodeIndex[$absoluteXPath]['attributes'] = array();
|
|
continue;
|
|
}
|
|
// Remove all the elements in the array then.
|
|
foreach($attrList as $name) {
|
|
unset($this->nodeIndex[$absoluteXPath]['attributes'][$name]);
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ Text Set/Get ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieve all the text from a node as a single string.
|
|
*
|
|
* Sample
|
|
* Given is: <AA> This <BB\>is <BB\> some<BB\>text </AA>
|
|
* Return of getData('/AA[1]') would be: " This is sometext "
|
|
* The first param $xPathQuery must be a valid xpath OR a xpath-query that
|
|
* results to *one* xpath.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node - resolves to *one* xpath.
|
|
* @return (mixed) The returned string (see above), FALSE if the node
|
|
* couldn't be found or is not unique.
|
|
* @see getDataParts()
|
|
*/
|
|
function getData($xPathQuery) {
|
|
$aDataParts = $this->getDataParts($xPathQuery);
|
|
if ($aDataParts === FALSE) return FALSE;
|
|
return implode('', $aDataParts);
|
|
}
|
|
|
|
/**
|
|
* Retrieve all the text from a node as a vector of strings
|
|
*
|
|
* Where each element of the array was interrupted by a non-text child element.
|
|
*
|
|
* Sample
|
|
* Given is: <AA> This <BB\>is <BB\> some<BB\>text </AA>
|
|
* Return of getDataParts('/AA[1]') would be: array([0]=>' This ', [1]=>'is ', [2]=>' some', [3]=>'text ');
|
|
* The first param $absoluteXPath must be a valid xpath OR a xpath-query that results
|
|
* to *one* xpath.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node - resolves to *one* xpath.
|
|
* @return (mixed) The returned array (see above), or FALSE if node is not
|
|
* found or is not unique.
|
|
* @see getData()
|
|
*/
|
|
function getDataParts($xPathQuery) {
|
|
// Resolve xPath argument
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery, 'getDataParts');
|
|
if (count($xPathSet) != 1) {
|
|
$this->_displayError(sprintf($this->errorStrings['AbsoluteXPathRequired'], $absoluteXPath), __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
$absoluteXPath = $xPathSet[0];
|
|
|
|
// Is it an attribute node?
|
|
if (preg_match(";(.*)/attribute::([^/]*)$;U", $xPathSet[0], $matches)) {
|
|
$absoluteXPath = $matches[1];
|
|
$attribute = $matches[2];
|
|
if (!isSet($this->nodeIndex[$absoluteXPath]['attributes'][$attribute])) {
|
|
$this->_displayError("The $absoluteXPath/attribute::$attribute value isn't a node in this document.", __LINE__, __FILE__, FALSE);
|
|
continue;
|
|
}
|
|
return array($this->nodeIndex[$absoluteXPath]['attributes'][$attribute]);
|
|
} else if (preg_match(":(.*)/text\(\)(\[(.*)\])?$:U", $xPathQuery, $matches)) {
|
|
$absoluteXPath = $matches[1];
|
|
$textPartNr = $matches[2];
|
|
return array($this->nodeIndex[$absoluteXPath]['textParts'][$textPartNr]);
|
|
} else {
|
|
return $this->nodeIndex[$absoluteXPath]['textParts'];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrieves a sub string of a text-part OR attribute-value.
|
|
*
|
|
* This method retrieves the sub string of a specific text-part OR (if the
|
|
* $absoluteXPath references an attribute) the the sub string of the attribute value.
|
|
* If no 'direct referencing' is used (Xpath ends with text()[<part-number>]), then
|
|
* the first text-part of the node ist returned (if exsiting).
|
|
*
|
|
* @param $absoluteXPath (string) Xpath to the node (See note above).
|
|
* @param $offset (int) (optional, default is 0) Starting offset. (Just like PHP's substr())
|
|
* @param $count (number) (optional, default is ALL) Character count (Just like PHP's substr())
|
|
* @return (mixed) The sub string, FALSE if not found or on error
|
|
* @see XPathEngine::wholeText(), PHP's substr()
|
|
*/
|
|
function substringData($absoluteXPath, $offset = 0, $count = NULL) {
|
|
if (!($text = $this->wholeText($absoluteXPath))) return FALSE;
|
|
if (is_null($count)) {
|
|
return substr($text, $offset);
|
|
} else {
|
|
return substr($text, $offset, $count);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Replace a sub string of a text-part OR attribute-value.
|
|
*
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $replacement (string) The string to replace with.
|
|
* @param $offset (int) (optional, default is 0) Starting offset. (Just like PHP's substr_replace ())
|
|
* @param $count (number) (optional, default is 0=ALL) Character count (Just like PHP's substr_replace())
|
|
* @param $textPartNr (int) (optional) (see _getTextSet() )
|
|
* @return (bool) The new string value on success, FALSE if not found or on error
|
|
* @see substringData()
|
|
*/
|
|
function replaceData($xPathQuery, $replacement, $offset = 0, $count = 0, $textPartNr=1) {
|
|
if (!($textSet = $this->_getTextSet($xPathQuery, $textPartNr))) return FALSE;
|
|
$tSize=sizeOf($textSet);
|
|
for ($i=0; $i<$tSize; $i++) {
|
|
if ($count) {
|
|
$textSet[$i] = substr_replace($textSet[$i], $replacement, $offset, $count);
|
|
} else {
|
|
$textSet[$i] = substr_replace($textSet[$i], $replacement, $offset);
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Insert a sub string in a text-part OR attribute-value.
|
|
*
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $data (string) The string to replace with.
|
|
* @param $offset (int) (optional, default is 0) Offset at which to insert the data.
|
|
* @return (bool) The new string on success, FALSE if not found or on error
|
|
* @see replaceData()
|
|
*/
|
|
function insertData($xPathQuery, $data, $offset=0) {
|
|
return $this->replaceData($xPathQuery, $data, $offset, 0);
|
|
}
|
|
|
|
/**
|
|
* Append text data to the end of the text for an attribute OR node text-part.
|
|
*
|
|
* This method adds content to a node. If it's an attribute node, then
|
|
* the value of the attribute will be set, otherwise the passed data will append to
|
|
* character data of the node text-part. Per default the first text-part is taken.
|
|
*
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) to the node(s) (See note above).
|
|
* @param $data (string) String containing the content to be added.
|
|
* @param $textPartNr (int) (optional, default is 1) (see _getTextSet())
|
|
* @return (bool) TRUE on success, otherwise FALSE
|
|
* @see _getTextSet()
|
|
*/
|
|
function appendData($xPathQuery, $data, $textPartNr=1) {
|
|
if (!($textSet = $this->_getTextSet($xPathQuery, $textPartNr))) return FALSE;
|
|
$tSize=sizeOf($textSet);
|
|
for ($i=0; $i<$tSize; $i++) {
|
|
$textSet[$i] .= $data;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Delete the data of a node.
|
|
*
|
|
* This method deletes content of a node. If it's an attribute node, then
|
|
* the value of the attribute will be removed, otherwise the node text-part.
|
|
* will be deleted. Per default the first text-part is deleted.
|
|
*
|
|
* NOTE: When passing a xpath-query instead of an abs. Xpath.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) to the node(s) (See note above).
|
|
* @param $offset (int) (optional, default is 0) Starting offset. (Just like PHP's substr_replace())
|
|
* @param $count (number) (optional, default is 0=ALL) Character count. (Just like PHP's substr_replace())
|
|
* @param $textPartNr (int) (optional, default is 0) the text part to delete (see _getTextSet())
|
|
* @return (bool) TRUE on success, otherwise FALSE
|
|
* @see _getTextSet()
|
|
*/
|
|
function deleteData($xPathQuery, $offset=0, $count=0, $textPartNr=1) {
|
|
if (!($textSet = $this->_getTextSet($xPathQuery, $textPartNr))) return FALSE;
|
|
$tSize=sizeOf($textSet);
|
|
for ($i=0; $i<$tSize; $i++) {
|
|
if (!$count)
|
|
$textSet[$i] = "";
|
|
else
|
|
$textSet[$i] = substr_replace($textSet[$i],'', $offset, $count);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------------------
|
|
// XPath ------ Help Stuff ------
|
|
//-----------------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Decodes the character set entities in the given string.
|
|
*
|
|
* This function is given for convenience, as all text strings or attributes
|
|
* are going to come back to you with their entities still encoded. You can
|
|
* use this function to remove these entites.
|
|
*
|
|
* It makes use of the get_html_translation_table(HTML_ENTITIES) php library
|
|
* call, so is limited in the same ways. At the time of writing this seemed
|
|
* be restricted to iso-8859-1
|
|
*
|
|
* ### Provide an option that will do this by default.
|
|
*
|
|
* @param $encodedData (mixed) The string or array that has entities you would like to remove
|
|
* @param $reverse (bool) If TRUE entities will be encoded rather than decoded, ie
|
|
* < to < rather than < to <.
|
|
* @return (mixed) The string or array returned with entities decoded.
|
|
*/
|
|
function decodeEntities($encodedData, $reverse=FALSE) {
|
|
static $aEncodeTbl;
|
|
static $aDecodeTbl;
|
|
// Get the translation entities, but we'll cache the result to enhance performance.
|
|
if (empty($aDecodeTbl)) {
|
|
// Get the translation entities.
|
|
$aEncodeTbl = get_html_translation_table(HTML_ENTITIES);
|
|
$aDecodeTbl = array_flip($aEncodeTbl);
|
|
}
|
|
|
|
// If it's just a single string.
|
|
if (!is_array($encodedData)) {
|
|
if ($reverse) {
|
|
return strtr($encodedData, $aEncodeTbl);
|
|
} else {
|
|
return strtr($encodedData, $aDecodeTbl);
|
|
}
|
|
}
|
|
|
|
$result = array();
|
|
foreach($encodedData as $string) {
|
|
if ($reverse) {
|
|
$result[] = strtr($string, $aEncodeTbl);
|
|
} else {
|
|
$result[] = strtr($string, $aDecodeTbl);
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Parse the XML to a node-tree. A so called 'document'
|
|
*
|
|
* @param $xmlString (string) The string to turn into a document node.
|
|
* @return (&array) a node-tree
|
|
*/
|
|
function &_xml2Document($xmlString) {
|
|
$xmlOptions = array(
|
|
XML_OPTION_CASE_FOLDING => $this->getProperties('caseFolding'),
|
|
XML_OPTION_SKIP_WHITE => $this->getProperties('skipWhiteSpaces')
|
|
);
|
|
$xmlParser =& new XPathEngine($xmlOptions);
|
|
$xmlParser->setVerbose($this->properties['verboseLevel']);
|
|
// Parse the XML string
|
|
if (!$xmlParser->importFromString($xmlString)) {
|
|
$this->_displayError($xmlParser->getLastError(), __LINE__, __FILE__, FALSE);
|
|
return FALSE;
|
|
}
|
|
return $xmlParser->getNode('/');
|
|
}
|
|
|
|
/**
|
|
* Get a reference-list to node text part(s) or node attribute(s).
|
|
*
|
|
* If the Xquery references an attribute(s) (Xquery ends with attribute::),
|
|
* then the text value of the node-attribute(s) is/are returned.
|
|
* Otherwise the Xquery is referencing to text part(s) of node(s). This can be either a
|
|
* direct reference to text part(s) (Xquery ends with text()[<nr>]) or indirect reference
|
|
* (a simple Xquery to node(s)).
|
|
* 1) Direct Reference (Xquery ends with text()[<part-number>]):
|
|
* If the 'part-number' is omitted, the first text-part is assumed; starting by 1.
|
|
* Negative numbers are allowed, where -1 is the last text-part a.s.o.
|
|
* 2) Indirect Reference (a simple Xquery to node(s)):
|
|
* Default is to return the first text part(s). Optionally you may pass a parameter
|
|
* $textPartNr to define the text-part you want; starting by 1.
|
|
* Negative numbers are allowed, where -1 is the last text-part a.s.o.
|
|
*
|
|
* NOTE I : The returned vector is a set of references to the text parts / attributes.
|
|
* This is handy, if you wish to modify the contents.
|
|
* NOTE II: text-part numbers out of range will not be in the list
|
|
* NOTE III:Instead of an absolute xpath you may also pass a xpath-query.
|
|
* Depending on setModMatch() one, none or multiple nodes are affected.
|
|
*
|
|
* @param $xPathQuery (string) xpath to the node (See note above).
|
|
* @param $textPartNr (int) String containing the content to be set.
|
|
* @return (mixed) A vector of *references* to the text that match, or
|
|
* FALSE on error
|
|
* @see XPathEngine::wholeText()
|
|
*/
|
|
function _getTextSet($xPathQuery, $textPartNr=1) {
|
|
$status = FALSE;
|
|
|
|
$bDebugThisFunction = FALSE; // Get diagnostic output for this function
|
|
if ($bDebugThisFunction) {
|
|
$aStartTime = $this->_beginDebugFunction('_getTextSet');
|
|
echo "Node: $xPathQuery\n";
|
|
echo "Text Part Number: $textPartNr\n";
|
|
echo "<hr>";
|
|
}
|
|
|
|
$funcName = '_getTextSet';
|
|
$textSet = array();
|
|
|
|
do { // try-block
|
|
// Check if it's a Xpath reference to an attribut(s). Xpath ends with attribute::)
|
|
if (preg_match(";(.*)/(attribute::|@)([^/]*)$;U", $xPathQuery, $matches)) {
|
|
$xPathQuery = $matches[1];
|
|
$attribute = $matches[3];
|
|
// Quick out
|
|
if (isSet($this->nodeIndex[$xPathQuery])) {
|
|
$xPathSet[] = $xPathQuery;
|
|
} else {
|
|
// Try to evaluate the absoluteXPath (since it seems to be an Xquery and not an abs. Xpath)
|
|
$xPathSet = $this->_resolveXPathQuery("$xPathQuery/attribute::$attribute", $funcName);
|
|
}
|
|
foreach($xPathSet as $absoluteXPath) {
|
|
preg_match(";(.*)/attribute::([^/]*)$;U", $xPathSet[0], $matches);
|
|
$absoluteXPath = $matches[1];
|
|
$attribute = $matches[2];
|
|
if (!isSet($this->nodeIndex[$absoluteXPath]['attributes'][$attribute])) {
|
|
$this->_displayError("The $absoluteXPath/attribute::$attribute value isn't a node in this document.", __LINE__, __FILE__, FALSE);
|
|
continue;
|
|
}
|
|
$textSet[] =& $this->nodes[$absoluteXPath]['attributes'][$attribute];
|
|
}
|
|
$status = TRUE;
|
|
break; // try-block
|
|
}
|
|
|
|
// Check if it's a Xpath reference direct to a text-part(s). (xpath ends with text()[<part-number>])
|
|
if (preg_match(":(.*)/text\(\)(\[(.*)\])?$:U", $xPathQuery, $matches)) {
|
|
$xPathQuery = $matches[1];
|
|
// default to the first text node if a text node was not specified
|
|
$textPartNr = isSet($matches[2]) ? substr($matches[2],1,-1) : 1;
|
|
// Quick check
|
|
if (isSet($this->nodeIndex[$xPathQuery])) {
|
|
$xPathSet[] = $xPathQuery;
|
|
} else {
|
|
// Try to evaluate the absoluteXPath (since it seams to be an Xquery and not an abs. Xpath)
|
|
$xPathSet = $this->_resolveXPathQuery("$xPathQuery/text()[$textPartNr]", $funcName);
|
|
}
|
|
}
|
|
else {
|
|
// At this point we have been given an xpath with neither a 'text()' or 'attribute::' axis at the end
|
|
// So this means to get the text-part of the node. If parameter $textPartNr was not set, use the last
|
|
// text-part.
|
|
if (isSet($this->nodeIndex[$xPathQuery])) {
|
|
$xPathSet[] = $xPathQuery;
|
|
} else {
|
|
// Try to evaluate the absoluteXPath (since it seams to be an Xquery and not an abs. Xpath)
|
|
$xPathSet = $this->_resolveXPathQuery($xPathQuery, $funcName);
|
|
}
|
|
}
|
|
|
|
if ($bDebugThisFunction) {
|
|
echo "Looking up paths for:\n";
|
|
print_r($xPathSet);
|
|
}
|
|
|
|
// Now fetch all text-parts that match. (May be 0,1 or many)
|
|
foreach($xPathSet as $absoluteXPath) {
|
|
unset($text);
|
|
if ($text =& $this->wholeText($absoluteXPath, $textPartNr)) {
|
|
$textSet[] =& $text;
|
|
} else {
|
|
// The node does not yet have any text, so we have to add a '' string so that
|
|
// if we insert or replace to it, then we'll actually have something to op on.
|
|
$this->nodeIndex[$absoluteXPath]['textParts'][$textPartNr-1] = '';
|
|
$textSet[] =& $this->nodeIndex[$absoluteXPath]['textParts'][$textPartNr-1];
|
|
}
|
|
}
|
|
|
|
$status = TRUE;
|
|
} while (FALSE); // END try-block
|
|
|
|
if (!$status) $result = FALSE;
|
|
else $result = $textSet;
|
|
|
|
if ($bDebugThisFunction) $this->_closeDebugFunction($aStartTime, $result);
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Resolves an xPathQuery vector depending on the property['modMatch']
|
|
*
|
|
* To:
|
|
* - all matches,
|
|
* - the first
|
|
* - none (If the query matches more then one node.)
|
|
* see setModMatch() for details
|
|
*
|
|
* @param $xPathQuery (string) An xpath query targeting a single node
|
|
* @param $function (string) The function in which this check was called
|
|
* @return (array) Vector of $absoluteXPath's (May be empty)
|
|
* @see setModMatch()
|
|
*/
|
|
function _resolveXPathQuery($xPathQuery, $function) {
|
|
$xPathSet = array();
|
|
do { // try-block
|
|
if (isSet($this->nodeIndex[$xPathQuery])) {
|
|
$xPathSet[] = $xPathQuery;
|
|
break; // try-block
|
|
}
|
|
if (empty($xPathQuery)) break; // try-block
|
|
if (substr($xPathQuery, -1) === '/') break; // If the xPathQuery ends with '/' then it cannot be a good query.
|
|
// If this xPathQuery is not absolute then attempt to evaluate it
|
|
$xPathSet = $this->match($xPathQuery);
|
|
|
|
$resultSize = sizeOf($xPathSet);
|
|
switch($this->properties['modMatch']) {
|
|
case XPATH_QUERYHIT_UNIQUE :
|
|
if ($resultSize >1) {
|
|
$xPathSet = array();
|
|
if ($this->properties['verboseLevel']) $this->_displayError("Canceled function '{$function}'. The query '{$xPathQuery}' mached {$resultSize} nodes and 'modMatch' is set to XPATH_QUERYHIT_UNIQUE.", __LINE__, __FILE__, FALSE);
|
|
}
|
|
break;
|
|
case XPATH_QUERYHIT_FIRST :
|
|
if ($resultSize >1) {
|
|
$xPathSet = array($xPathSet[0]);
|
|
if ($this->properties['verboseLevel']) $this->_displayError("Only modified first node in function '{$function}' because the query '{$xPathQuery}' mached {$resultSize} nodes and 'modMatch' is set to XPATH_QUERYHIT_FIRST.", __LINE__, __FILE__, FALSE);
|
|
}
|
|
break;
|
|
default: ; // DO NOTHING
|
|
}
|
|
} while (FALSE);
|
|
|
|
if ($this->properties['verboseLevel'] >= 2) $this->_displayMessage("'{$xPathQuery}' parameter from '{$function}' returned the following nodes: ".(count($xPathSet)?implode('<br>', $xPathSet):'[none]'), __LINE__, __FILE__);
|
|
return $xPathSet;
|
|
}
|
|
} // END OF CLASS XPath
|
|
|
|
// -----------------------------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------------------------
|
|
// -----------------------------------------------------------------------------------------
|
|
|
|
/**************************************************************************************************
|
|
// Usage Sample:
|
|
// -------------
|
|
// Following code will give you an idea how to work with PHP.XPath. It's a working sample
|
|
// to help you get started. :o)
|
|
// Take the comment tags away and run this file.
|
|
**************************************************************************************************/
|
|
|
|
/**
|
|
* Produces a short title line.
|
|
*/
|
|
/*
|
|
function _title($title) {
|
|
echo "<br><hr><b>" . htmlspecialchars($title) . "</b><hr>\n";
|
|
}
|
|
|
|
$self = isSet($_SERVER) ? $_SERVER['PHP_SELF'] : $PHP_SELF;
|
|
if (basename($self) == 'class.xpath.inc.php') {
|
|
// The sampe source:
|
|
$q = '?';
|
|
$xmlSource = <<< EOD
|
|
<{$q}Process_Instruction test="© All right reserved" {$q}>
|
|
<AAA foo="bar"> ,,1,,
|
|
..1.. <![CDATA[ bla bla
|
|
newLine blo blo ]]>
|
|
<BBB foo="bar">
|
|
..2..
|
|
</BBB>..3..<CC/> ..4..</AAA>
|
|
EOD;
|
|
|
|
// The sample code:
|
|
$xmlOptions = array(XML_OPTION_CASE_FOLDING => TRUE, XML_OPTION_SKIP_WHITE => TRUE);
|
|
$xPath =& new XPath(FALSE, $xmlOptions);
|
|
//$xPath->bDebugXmlParse = TRUE;
|
|
if (!$xPath->importFromString($xmlSource)) { echo $xPath->getLastError(); exit; }
|
|
|
|
_title("Following was imported:");
|
|
echo $xPath->exportAsHtml();
|
|
|
|
_title("Get some content");
|
|
echo "Last text part in <AAA>: '" . $xPath->wholeText('/AAA[1]', -1) ."'<br>\n";
|
|
echo "All the text in <AAA>: '" . $xPath->wholeText('/AAA[1]') ."'<br>\n";
|
|
echo "The attibute value in <BBB> using getAttributes('/AAA[1]/BBB[1]', 'FOO'): '" . $xPath->getAttributes('/AAA[1]', 'FOO') ."'<br>\n";
|
|
echo "The attibute value in <BBB> using getData('/AAA[1]/@FOO'): '" . $xPath->getData('/AAA[1]/@FOO') ."'<br>\n";
|
|
|
|
_title("Append some additional XML below /AAA/BBB:");
|
|
$xPath->appendChild('/AAA[1]/BBB[1]', '<CCC> Step 1. Append new node </CCC>', $afterText=FALSE);
|
|
$xPath->appendChild('/AAA[1]/BBB[1]', '<CCC> Step 2. Append new node </CCC>', $afterText=TRUE);
|
|
$xPath->appendChild('/AAA[1]/BBB[1]', '<CCC> Step 3. Append new node </CCC>', $afterText=TRUE);
|
|
echo $xPath->exportAsHtml();
|
|
|
|
_title("Insert some additional XML below <AAA>:");
|
|
$xPath->reindexNodeTree();
|
|
$xPath->insertChild('/AAA[1]/BBB[1]', '<BB> Step 1. Insert new node </BB>', $shiftRight=TRUE, $afterText=TRUE);
|
|
$xPath->insertChild('/AAA[1]/BBB[1]', '<BB> Step 2. Insert new node </BB>', $shiftRight=FALSE, $afterText=TRUE);
|
|
$xPath->insertChild('/AAA[1]/BBB[1]', '<BB> Step 3. Insert new node </BB>', $shiftRight=FALSE, $afterText=FALSE);
|
|
echo $xPath->exportAsHtml();
|
|
|
|
_title("Replace the last <BB> node with new XML data '<DDD> Replaced last BB </DDD>':");
|
|
$xPath->reindexNodeTree();
|
|
$xPath->replaceChild('/AAA[1]/BB[last()]', '<DDD> Replaced last BB </DDD>', $afterText=FALSE);
|
|
echo $xPath->exportAsHtml();
|
|
|
|
_title("Replace second <BB> node with normal text");
|
|
$xPath->reindexNodeTree();
|
|
$xPath->replaceChildByData('/AAA[1]/BB[2]', '"Some new text"');
|
|
echo $xPath->exportAsHtml();
|
|
}
|
|
*/
|
|
?>
|