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* API: adding library idna_convert by Matthias Sommerfeld, and some egw_wrapper for basic config and autoloading

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Klaus Leithoff 2013-01-10 14:55:35 +00:00
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<?php
/**
* eGroupWare API: egw class to include (and configure (basic)) idna_convert by Matthias Sommerfeld <mso@phlylabs.de>
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage idna_convert
* @author Klaus Leithoff <kl-AT-stylite.de>
* @version $Id$
*/
require_once(EGW_API_INC.'/idna_convert/idna_convert.class.php');
/**
* This class does NOT use anything EGroupware specific, it just calls idna_convert and supports autoloading
* while matching egw namespace requirements, and switch to idn version 2008 by default
*/
class egw_idna extends idna_convert
{
function __construct($options = false)
{
$this->_idn_version = 2008; // Can be either 2003 (old, default) or 2008
// if options is given, the above may be changed according to $options['idn_version']
parent::__construct($options);
/*
if ($idna2==false && (@include_once 'Net/IDNA2.php') != false) {
_debug_array('Umlautdomains supported (by PEAR)');
$idna2 = new Net_IDNA2;
}
*/
}
}

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*******************************************************************************
* *
* IDNA Convert (idna_convert.class.php) *
* *
* http://idnaconv.phlymail.de mailto:phlymail@phlylabs.de *
*******************************************************************************
* (c) 2004-2011 phlyLabs, Berlin *
* This file is encoded in UTF-8 *
*******************************************************************************
Introduction
------------
The class idna_convert allows to convert internationalized domain names
(see RFC 3490, 3491, 3492 and 3454 for detials) as they can be used with various
registries worldwide to be translated between their original (localized) form
and their encoded form as it will be used in the DNS (Domain Name System).
The class provides two public methods, encode() and decode(), which do exactly
what you would expect them to do. You are allowed to use complete domain names,
simple strings and complete email addresses as well. That means, that you might
use any of the following notations:
- www.nörgler.com
- xn--nrgler-wxa
- xn--brse-5qa.xn--knrz-1ra.info
Errors, incorrectly encoded or invalid strings will lead to either a FALSE
response (when in strict mode) or to only partially converted strings.
You can query the occured error by calling the method get_last_error().
Unicode strings are expected to be either UTF-8 strings, UCS-4 strings or UCS-4
arrays. The default format is UTF-8. For setting different encodings, you can
call the method setParams() - please see the inline documentation for details.
ACE strings (the Punycode form) are always 7bit ASCII strings.
ATTENTION: As of version 0.6.0 this class is written in the OOP style of PHP5.
Since PHP4 is no longer actively maintained, you should switch to PHP5 as fast as
possible.
We expect to see no compatibility issues with the upcoming PHP6, too.
ATTENTION: BC break! As of version 0.6.4 the class per default allows the German
ligature ß to be encoded as the DeNIC, the registry for .DE allows domains
containing ß.
In older builds "ß" was mapped to "ss". Should you still need this behaviour,
see example 5 below.
ATTENTION: As of version 0.8.0 the class fully supports IDNA 2008. Thus the
aforementioned parameter is deprecated and replaced by a parameter to switch
between the standards. See the updated example 5 below.
Files
-----
idna_convert.class.php - The actual class
example.php - An example web page for converting
transcode_wrapper.php - Convert various encodings, see below
uctc.php - phlyLabs' Unicode Transcoder, see below
ReadMe.txt - This file
LICENCE - The LGPL licence file
The class is contained in idna_convert.class.php.
Examples
--------
1. Say we wish to encode the domain name nörgler.com:
// Include the class
require_once('idna_convert.class.php');
// Instantiate it
$IDN = new idna_convert();
// The input string, if input is not UTF-8 or UCS-4, it must be converted before
$input = utf8_encode('nörgler.com');
// Encode it to its punycode presentation
$output = $IDN->encode($input);
// Output, what we got now
echo $output; // This will read: xn--nrgler-wxa.com
2. We received an email from a punycoded domain and are willing to learn, how
the domain name reads originally
// Include the class
require_once('idna_convert.class.php');
// Instantiate it
$IDN = new idna_convert();
// The input string
$input = 'andre@xn--brse-5qa.xn--knrz-1ra.info';
// Encode it to its punycode presentation
$output = $IDN->decode($input);
// Output, what we got now, if output should be in a format different to UTF-8
// or UCS-4, you will have to convert it before outputting it
echo utf8_decode($output); // This will read: andre@börse.knörz.info
3. The input is read from a UCS-4 coded file and encoded line by line. By
appending the optional second parameter we tell enode() about the input
format to be used
// Include the class
require_once('idna_convert.class.php');
// Instantiate it
$IDN = new dinca_convert();
// Iterate through the input file line by line
foreach (file('ucs4-domains.txt') as $line) {
echo $IDN->encode(trim($line), 'ucs4_string');
echo "\n";
}
4. We wish to convert a whole URI into the IDNA form, but leave the path or
query string component of it alone. Just using encode() would lead to mangled
paths or query strings. Here the public method encode_uri() comes into play:
// Include the class
require_once('idna_convert.class.php');
// Instantiate it
$IDN = new idna_convert();
// The input string, a whole URI in UTF-8 (!)
$input = 'http://nörgler:secret@nörgler.com/my_päth_is_not_ÄSCII/');
// Encode it to its punycode presentation
$output = $IDN->encode_uri($input);
// Output, what we got now
echo $output; // http://nörgler:secret@xn--nrgler-wxa.com/my_päth_is_not_ÄSCII/
5. To support IDNA 2008, the class needs to be invoked with an additional
parameter. This can also be achieved on an instance.
// Include the class
require_once('idna_convert.class.php');
// Instantiate it
$IDN = new idna_convert(array('idn_version' => 2008));
// Sth. containing the German letter ß
$input = 'meine-straße.de');
// Encode it to its punycode presentation
$output = $IDN->encode_uri($input);
// Output, what we got now
echo $output; // xn--meine-strae-46a.de
// Switch back to old IDNA 2003, the original standard
$IDN->set_parameter('idn_version', 2003);
// Sth. containing the German letter ß
$input = 'meine-straße.de');
// Encode it to its punycode presentation
$output = $IDN->encode_uri($input);
// Output, what we got now
echo $output; // meine-strasse.de
Transcode wrapper
-----------------
In case you have strings in different encoding than ISO-8859-1 and UTF-8 you might need to
translate these strings to UTF-8 before feeding the IDNA converter with it.
PHP's built in functions utf8_encode() and utf8_decode() can only deal with ISO-8859-1.
Use the file transcode_wrapper.php for the conversion. It requires either iconv, libiconv
or mbstring installed together with one of the relevant PHP extensions.
The functions you will find useful are
encode_utf8() as a replacement for utf8_encode() and
decode_utf8() as a replacement for utf8_decode().
Example usage:
<?php
require_once('idna_convert.class.php');
require_once('transcode_wrapper.php');
$mystring = '<something in e.g. ISO-8859-15';
$mystring = encode_utf8($mystring, 'ISO-8859-15');
echo $IDN->encode($mystring);
?>
UCTC - Unicode Transcoder
-------------------------
Another class you might find useful when dealing with one or more of the Unicode encoding
flavours. The class is static, it requires PHP5. It can transcode into each other:
- UCS-4 string / array
- UTF-8
- UTF-7
- UTF-7 IMAP (modified UTF-7)
All encodings expect / return a string in the given format, with one major exception:
UCS-4 array is jsut an array, where each value represents one codepoint in the string, i.e.
every value is a 32bit integer value.
Example usage:
<?php
require_once('uctc.php');
$mystring = 'nörgler.com';
echo uctc::convert($mystring, 'utf8', 'utf7imap');
?>
Contact us
----------
In case of errors, bugs, questions, wishes, please don't hesitate to contact us
under the email address above.
The team of phlyLabs
http://phlylabs.de
mailto:phlymail@phlylabs.de

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<?php
$encoded = $decoded = $add = '';
header('Content-Type: text/html; charset=utf-8');
require_once('idna_convert.class.php');
$idn_version = isset($_REQUEST['idn_version']) && $_REQUEST['idn_version'] == 2003 ? 2003 : 2008;
$IDN = new idna_convert(array('idn_version' => $idn_version));
$version_select = '<select size="1" name="idn_version"><option value="2003">IDNA 2003</option><option value="2008"';
if ($idn_version == 2008) {
$version_select .= ' selected="selected"';
}
$version_select .= '>IDNA 2008</option></select>';
if (isset($_REQUEST['encode'])) {
$decoded = isset($_REQUEST['decoded']) ? stripslashes($_REQUEST['decoded']) : '';
$encoded = $IDN->encode($decoded);
}
if (isset($_REQUEST['decode'])) {
$encoded = isset($_REQUEST['encoded']) ? stripslashes($_REQUEST['encoded']) : '';
$decoded = $IDN->decode($encoded);
}
$lang = 'en';
if (isset($_REQUEST['lang'])) {
if ('de' == $_REQUEST['lang'] || 'en' == $_REQUEST['lang']) $lang = $_REQUEST['lang'];
$add .= '<input type="hidden" name="lang" value="'.$_REQUEST['lang'].'" />'."\n";
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>phlyLabs Punycode Converter</title>
<meta name="author" content="phlyLabs" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<style type="text/css">
/*<![CDATA[*/
body { color:black;background:white;font-size:10pt;font-family:Verdana,Helvetica,Sans-Serif; }
body, form { margin:0; }
form { display:inline; }
input { font-size:8pt;font-family:Verdana,Helvetica,Sans-Serif; }
#round { width:730px;padding:10px;background-color:rgb(230,230,240);border:1px solid black;text-align:center;vertical-align:middle;margin:auto;margin-top:50px; }
th { font-size:9pt;font-weight:bold; }
#copy { font-size:8pt;color:rgb(60,60,80); }
#subhead { font-size:8pt; }
#bla { font-size:8pt;text-align:left; }
h5 {margin:0;font-size:11pt;font-weight:bold;}
/*]]>*/
</style>
</head>
<body>
<div id="round">
<h5>phlyLabs' pure PHP IDNA Converter</h5><br />
<span id="subhead">
See the RFCs <a href="http://faqs.org/rfcs/rfc3490.html" title="IDNA" target="_blank">3490</a>,
<a href="http://faqs.org/rfcs/rfc3491.html" title="Nameprep, a Stringprep profile" target="_blank">3491</a>,
<a href="http://faqs.org/rfcs/rfc3492.html" title="Punycode" target="_blank">3492</a> and
<a href="http://faqs.org/rfcs/rfc3454.html" title="Stringprep" target="_blank">3454</a> as well as
<a href="http://faqs.org/rfcs/rfc5890.html" target="_blank">5890</a>,
<a href="http://faqs.org/rfcs/rfc5891.html" target="_blank">5891</a>,
<a href="http://faqs.org/rfcs/rfc5892.html" target="_blank">5892</a>,
<a href="http://faqs.org/rfcs/rfc5893.html" target="_blank">5893</a> and
<a href="http://faqs.org/rfcs/rfc5894.html" target="_blank">RFC5894</a>.<br />
</span>
<br />
<div id="bla"><?php if ($lang == 'de') { ?>
Dieser Konverter erlaubt die Übersetzung von Domainnamen zwischen der Punycode- und der
Unicode-Schreibweise.<br />
Geben Sie einfach den Domainnamen im entsprechend bezeichneten Feld ein und klicken Sie dann auf den darunter
liegenden Button. Sie können einfache Domainnamen, komplette URLs (wie http://jürgen-müller.de)
oder Emailadressen eingeben.<br />
<br />
Stellen Sie aber sicher, dass Ihr Browser den Zeichensatz <strong>UTF-8</strong> unterstützt.<br />
<br />
Wenn Sie Interesse an der zugrundeliegenden PHP-Klasse haben, können Sie diese
<a href="http://phlymail.com/de/downloads/idna/download/">hier herunterladen</a>.<br />
<br />
Diese Klasse wird ohne Garantie ihrer Funktionstüchtigkeit bereit gestellt. Nutzung auf eigene Gefahr.<br />
Um sicher zu stellen, dass eine Zeichenkette korrekt umgewandelt wurde, sollten Sie diese immer zurückwandeln
und das Ergebnis mit Ihrer ursprünglichen Eingabe vergleichen.<br />
<br />
Fehler und Probleme können Sie gern an <a href="mailto:team@phlymail.de">team@phlymail.de</a> senden.<br />
<?php } else { ?>
This converter allows you to transfer domain names between the encoded (Punycode) notation
and the decoded (UTF-8) notation.<br />
Just enter the domain name in the respective field and click on the button right below it to have
it converted. Please note, that you might even enter complete domain names (like j&#xFC;rgen-m&#xFC;ller.de)
or a email addresses.<br />
<br />
Make sure, that your browser is capable of the <strong>UTF-8</strong> character encoding.<br />
<br />
For those of you interested in the PHP source of the underlying class, you might
<a href="http://phlymail.com/en/downloads/idna/download/">download it here</a>.<br />
<br />
Please be aware, that this class is provided as is and without any liability. Use at your own risk.<br />
To ensure, that a certain string has been converted correctly, you should convert it both ways and compare the
results.<br />
<br />
Please feel free to report bugs and problems to: <a href="mailto:team@phlymail.com">team@phlymail.com</a>.<br />
<?php } ?>
<br />
</div>
<table border="0" cellpadding="2" cellspacing="2" align="center">
<thead>
<tr>
<th align="left">Original (Unicode)</th>
<th align="right">Punycode (ACE)</th>
</tr>
</thead>
<tbody>
<tr>
<td align="right">
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="get">
<input type="text" name="decoded" value="<?php echo htmlentities($decoded, null, 'UTF-8'); ?>" size="48" maxlength="255" /><br />
<?php echo $version_select; ?>
<input type="submit" name="encode" value="Encode &gt;&gt;" /><?php echo $add; ?>
</form>
</td>
<td align="left">
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="get">
<input type="text" name="encoded" value="<?php echo htmlentities($encoded, null, 'UTF-8'); ?>" size="48" maxlength="255" /><br />
<input type="submit" name="decode" value="&lt;&lt; Decode" /><?php echo $add; ?>
</form>
</td>
</tr>
</tbody>
</table>
<br />
<span id="copy">Version used: 0.8.0; &copy; 2004-2011 phlyLabs Berlin; part of <a href="http://phlymail.com/">phlyMail</a></span>
</div>
</body>
</html>

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<?php
/**
* transcode wrapper functions
* @package IDNA Convert
* @subpackage charset transcoding
* @author Matthias Sommerfeld, <mso@phlylabs.de>
* @version 0.1.0
*/
/**
* Convert a string from any of various encodings to UTF-8
*
* @param string String to encode
*[@param string Encoding; Default: ISO-8859-1]
*[@param bool Safe Mode: if set to TRUE, the original string is retunred on errors]
* @return string The encoded string or false on failure
* @since 0.0.1
*/
function encode_utf8($string = '', $encoding = 'iso-8859-1', $safe_mode = false)
{
$safe = ($safe_mode) ? $string : false;
if (strtoupper($encoding) == 'UTF-8' || strtoupper($encoding) == 'UTF8') {
return $string;
} elseif (strtoupper($encoding) == 'ISO-8859-1') {
return utf8_encode($string);
} elseif (strtoupper($encoding) == 'WINDOWS-1252') {
return utf8_encode(map_w1252_iso8859_1($string));
} elseif (strtoupper($encoding) == 'UNICODE-1-1-UTF-7') {
$encoding = 'utf-7';
}
if (function_exists('mb_convert_encoding')) {
$conv = @mb_convert_encoding($string, 'UTF-8', strtoupper($encoding));
if ($conv) return $conv;
}
if (function_exists('iconv')) {
$conv = @iconv(strtoupper($encoding), 'UTF-8', $string);
if ($conv) return $conv;
}
if (function_exists('libiconv')) {
$conv = @libiconv(strtoupper($encoding), 'UTF-8', $string);
if ($conv) return $conv;
}
return $safe;
}
/**
* Convert a string from UTF-8 to any of various encodings
*
* @param string String to decode
*[@param string Encoding; Default: ISO-8859-1]
*[@param bool Safe Mode: if set to TRUE, the original string is retunred on errors]
* @return string The decoded string or false on failure
* @since 0.0.1
*/
function decode_utf8($string = '', $encoding = 'iso-8859-1', $safe_mode = false)
{
$safe = ($safe_mode) ? $string : false;
if (!$encoding) $encoding = 'ISO-8859-1';
if (strtoupper($encoding) == 'UTF-8' || strtoupper($encoding) == 'UTF8') {
return $string;
} elseif (strtoupper($encoding) == 'ISO-8859-1') {
return utf8_decode($string);
} elseif (strtoupper($encoding) == 'WINDOWS-1252') {
return map_iso8859_1_w1252(utf8_decode($string));
} elseif (strtoupper($encoding) == 'UNICODE-1-1-UTF-7') {
$encoding = 'utf-7';
}
if (function_exists('mb_convert_encoding')) {
$conv = @mb_convert_encoding($string, strtoupper($encoding), 'UTF-8');
if ($conv) return $conv;
}
if (function_exists('iconv')) {
$conv = @iconv('UTF-8', strtoupper($encoding), $string);
if ($conv) return $conv;
}
if (function_exists('libiconv')) {
$conv = @libiconv('UTF-8', strtoupper($encoding), $string);
if ($conv) return $conv;
}
return $safe;
}
/**
* Special treatment for our guys in Redmond
* Windows-1252 is basically ISO-8859-1 -- with some exceptions, which get accounted for here
* @param string Your input in Win1252
* @param string The resulting ISO-8859-1 string
* @since 3.0.8
*/
function map_w1252_iso8859_1($string = '')
{
if ($string == '') return '';
$return = '';
for ($i = 0; $i < strlen($string); ++$i) {
$c = ord($string{$i});
switch ($c) {
case 129: $return .= chr(252); break;
case 132: $return .= chr(228); break;
case 142: $return .= chr(196); break;
case 148: $return .= chr(246); break;
case 153: $return .= chr(214); break;
case 154: $return .= chr(220); break;
case 225: $return .= chr(223); break;
default: $return .= chr($c); break;
}
}
return $return;
}
/**
* Special treatment for our guys in Redmond
* Windows-1252 is basically ISO-8859-1 -- with some exceptions, which get accounted for here
* @param string Your input in ISO-8859-1
* @param string The resulting Win1252 string
* @since 3.0.8
*/
function map_iso8859_1_w1252($string = '')
{
if ($string == '') return '';
$return = '';
for ($i = 0; $i < strlen($string); ++$i) {
$c = ord($string{$i});
switch ($c) {
case 196: $return .= chr(142); break;
case 214: $return .= chr(153); break;
case 220: $return .= chr(154); break;
case 223: $return .= chr(225); break;
case 228: $return .= chr(132); break;
case 246: $return .= chr(148); break;
case 252: $return .= chr(129); break;
default: $return .= chr($c); break;
}
}
return $return;
}
?>

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<?php
/**
* UCTC - The Unicode Transcoder
*
* Converts between various flavours of Unicode representations like UCS-4 or UTF-8
* Supported schemes:
* - UCS-4 Little Endian / Big Endian / Array (partially)
* - UTF-16 Little Endian / Big Endian (not yet)
* - UTF-8
* - UTF-7
* - UTF-7 IMAP (modified UTF-7)
*
* @package phlyMail Nahariya 4.0+ Default branch
* @author Matthias Sommerfeld <mso@phlyLabs.de>
* @copyright 2003-2009 phlyLabs Berlin, http://phlylabs.de
* @version 0.0.6 2009-05-10
*/
class uctc {
private static $mechs = array('ucs4', /*'ucs4le', 'ucs4be', */'ucs4array', /*'utf16', 'utf16le', 'utf16be', */'utf8', 'utf7', 'utf7imap');
private static $allow_overlong = false;
private static $safe_mode;
private static $safe_char;
/**
* The actual conversion routine
*
* @param mixed $data The data to convert, usually a string, array when converting from UCS-4 array
* @param string $from Original encoding of the data
* @param string $to Target encoding of the data
* @param bool $safe_mode SafeMode tries to correct invalid codepoints
* @return mixed False on failure, String or array on success, depending on target encoding
* @access public
* @since 0.0.1
*/
public static function convert($data, $from, $to, $safe_mode = false, $safe_char = 0xFFFC)
{
self::$safe_mode = ($safe_mode) ? true : false;
self::$safe_char = ($safe_char) ? $safe_char : 0xFFFC;
if (self::$safe_mode) self::$allow_overlong = true;
if (!in_array($from, self::$mechs)) throw new Exception('Invalid input format specified');
if (!in_array($to, self::$mechs)) throw new Exception('Invalid output format specified');
if ($from != 'ucs4array') eval('$data = self::'.$from.'_ucs4array($data);');
if ($to != 'ucs4array') eval('$data = self::ucs4array_'.$to.'($data);');
return $data;
}
/**
* This converts an UTF-8 encoded string to its UCS-4 representation
*
* @param string $input The UTF-8 string to convert
* @return array Array of 32bit values representing each codepoint
* @access private
*/
private static function utf8_ucs4array($input)
{
$output = array();
$out_len = 0;
$inp_len = strlen($input);
$mode = 'next';
$test = 'none';
for ($k = 0; $k < $inp_len; ++$k) {
$v = ord($input{$k}); // Extract byte from input string
if ($v < 128) { // We found an ASCII char - put into stirng as is
$output[$out_len] = $v;
++$out_len;
if ('add' == $mode) {
if (self::$safe_mode) {
$output[$out_len-2] = self::$safe_char;
$mode = 'next';
} else {
throw new Exception('Conversion from UTF-8 to UCS-4 failed: malformed input at byte '.$k);
}
}
continue;
}
if ('next' == $mode) { // Try to find the next start byte; determine the width of the Unicode char
$start_byte = $v;
$mode = 'add';
$test = 'range';
if ($v >> 5 == 6) { // &110xxxxx 10xxxxx
$next_byte = 0; // Tells, how many times subsequent bitmasks must rotate 6bits to the left
$v = ($v - 192) << 6;
} elseif ($v >> 4 == 14) { // &1110xxxx 10xxxxxx 10xxxxxx
$next_byte = 1;
$v = ($v - 224) << 12;
} elseif ($v >> 3 == 30) { // &11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
$next_byte = 2;
$v = ($v - 240) << 18;
} elseif (self::$safe_mode) {
$mode = 'next';
$output[$out_len] = self::$safe_char;
++$out_len;
continue;
} else {
throw new Exception('This might be UTF-8, but I don\'t understand it at byte '.$k);
}
if ($inp_len-$k-$next_byte < 2) {
$output[$out_len] = self::$safe_char;
$mode = 'no';
continue;
}
if ('add' == $mode) {
$output[$out_len] = (int) $v;
++$out_len;
continue;
}
}
if ('add' == $mode) {
if (!self::$allow_overlong && $test == 'range') {
$test = 'none';
if (($v < 0xA0 && $start_byte == 0xE0) || ($v < 0x90 && $start_byte == 0xF0) || ($v > 0x8F && $start_byte == 0xF4)) {
throw new Exception('Bogus UTF-8 character detected (out of legal range) at byte '.$k);
}
}
if ($v >> 6 == 2) { // Bit mask must be 10xxxxxx
$v = ($v-128) << ($next_byte*6);
$output[($out_len-1)] += $v;
--$next_byte;
} else {
if (self::$safe_mode) {
$output[$out_len-1] = ord(self::$safe_char);
$k--;
$mode = 'next';
continue;
} else {
throw new Exception('Conversion from UTF-8 to UCS-4 failed: malformed input at byte '.$k);
}
}
if ($next_byte < 0) {
$mode = 'next';
}
}
} // for
return $output;
}
/**
* Convert UCS-4 string into UTF-8 string
* See utf8_ucs4array() for details
* @access private
*/
private static function ucs4array_utf8($input)
{
$output = '';
foreach ($input as $v) {
if ($v < 128) { // 7bit are transferred literally
$output .= chr($v);
} elseif ($v < (1 << 11)) { // 2 bytes
$output .= chr(192+($v >> 6)).chr(128+($v & 63));
} elseif ($v < (1 << 16)) { // 3 bytes
$output .= chr(224+($v >> 12)).chr(128+(($v >> 6) & 63)).chr(128+($v & 63));
} elseif ($v < (1 << 21)) { // 4 bytes
$output .= chr(240+($v >> 18)).chr(128+(($v >> 12) & 63)).chr(128+(($v >> 6) & 63)).chr(128+($v & 63));
} elseif (self::$safe_mode) {
$output .= self::$safe_char;
} else {
throw new Exception('Conversion from UCS-4 to UTF-8 failed: malformed input at byte '.$k);
}
}
return $output;
}
private static function utf7imap_ucs4array($input)
{
return self::utf7_ucs4array(str_replace(',', '/', $input), '&');
}
private static function utf7_ucs4array($input, $sc = '+')
{
$output = array();
$out_len = 0;
$inp_len = strlen($input);
$mode = 'd';
$b64 = '';
for ($k = 0; $k < $inp_len; ++$k) {
$c = $input{$k};
if (0 == ord($c)) continue; // Ignore zero bytes
if ('b' == $mode) {
// Sequence got terminated
if (!preg_match('![A-Za-z0-9/'.preg_quote($sc, '!').']!', $c)) {
if ('-' == $c) {
if ($b64 == '') {
$output[$out_len] = ord($sc);
$out_len++;
$mode = 'd';
continue;
}
}
$tmp = base64_decode($b64);
$tmp = substr($tmp, -1 * (strlen($tmp) % 2));
for ($i = 0; $i < strlen($tmp); $i++) {
if ($i % 2) {
$output[$out_len] += ord($tmp{$i});
$out_len++;
} else {
$output[$out_len] = ord($tmp{$i}) << 8;
}
}
$mode = 'd';
$b64 = '';
continue;
} else {
$b64 .= $c;
}
}
if ('d' == $mode) {
if ($sc == $c) {
$mode = 'b';
continue;
}
$output[$out_len] = ord($c);
$out_len++;
}
}
return $output;
}
private static function ucs4array_utf7imap($input)
{
return str_replace('/', ',', self::ucs4array_utf7($input, '&'));
}
private static function ucs4array_utf7($input, $sc = '+')
{
$output = '';
$mode = 'd';
$b64 = '';
while (true) {
$v = (!empty($input)) ? array_shift($input) : false;
$is_direct = (false !== $v) ? (0x20 <= $v && $v <= 0x7e && $v != ord($sc)) : true;
if ($mode == 'b') {
if ($is_direct) {
if ($b64 == chr(0).$sc) {
$output .= $sc.'-';
$b64 = '';
} elseif ($b64) {
$output .= $sc.str_replace('=', '', base64_encode($b64)).'-';
$b64 = '';
}
$mode = 'd';
} elseif (false !== $v) {
$b64 .= chr(($v >> 8) & 255). chr($v & 255);
}
}
if ($mode == 'd' && false !== $v) {
if ($is_direct) {
$output .= chr($v);
} else {
$b64 = chr(($v >> 8) & 255). chr($v & 255);
$mode = 'b';
}
}
if (false === $v && $b64 == '') break;
}
return $output;
}
/**
* Convert UCS-4 array into UCS-4 string (Little Endian at the moment)
* @access private
*/
private static function ucs4array_ucs4($input)
{
$output = '';
foreach ($input as $v) {
$output .= chr(($v >> 24) & 255).chr(($v >> 16) & 255).chr(($v >> 8) & 255).chr($v & 255);
}
return $output;
}
/**
* Convert UCS-4 string (LE in the moment) into UCS-4 garray
* @access private
*/
private static function ucs4_ucs4array($input)
{
$output = array();
$inp_len = strlen($input);
// Input length must be dividable by 4
if ($inp_len % 4) {
throw new Exception('Input UCS4 string is broken');
}
// Empty input - return empty output
if (!$inp_len) return $output;
for ($i = 0, $out_len = -1; $i < $inp_len; ++$i) {
if (!($i % 4)) { // Increment output position every 4 input bytes
$out_len++;
$output[$out_len] = 0;
}
$output[$out_len] += ord($input{$i}) << (8 * (3 - ($i % 4) ) );
}
return $output;
}
}
?>