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131 lines
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131 lines
4.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.21">
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<TITLE>phpgwapi - VFS Class: Basic Functions</TITLE>
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<LINK HREF="vfs-4.html" REL=next>
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<LINK HREF="vfs-2.html" REL=previous>
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<LINK HREF="vfs.html#toc3" REL=contents>
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</HEAD>
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<BODY>
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<A HREF="vfs-4.html">Next</A>
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<A HREF="vfs-2.html">Previous</A>
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<A HREF="vfs.html#toc3">Contents</A>
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<HR>
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<H2><A NAME="sec:basic_functions"></A> <A NAME="s3">3.</A> <A HREF="vfs.html#toc3">Basic Functions</A></H2>
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<P>There are two functions you'll need to know before we get into
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relativity.</P>
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<H2><A NAME="sec:path_parts"></A> <A NAME="ss3.1">3.1</A> <A HREF="vfs.html#toc3.1">path_parts ()</A>
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</H2>
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<P>The job of path_parts () is to translate any given file location
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into its many component parts for any relativity. The values passed
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to path_parts () are:</P>
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<P>
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<PRE>
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string
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relatives
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object
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</PRE>
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</P>
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<P>'string' is the path you want to translate, 'relatives' is the
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standard relativity array, and 'object' specifies how you would like
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the return value: if 'object' is True, an object will be returned;
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if 'object' is False, an array will be returned. I think you'll find
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the object easier to deal with, and we'll be using it throughout
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this document. The most important returned values (but not all) for
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path_parts () are:</P>
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<P>
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<PRE>
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fake_full_path
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fake_leading_dirs
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fake_extra_path
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fake_name
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real_full_path
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real_leading_dirs
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real_extra_path
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real_name
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</PRE>
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</P>
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<P>Just like you would think, fake_full_path contains the full virtual
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path of 'string', and real_full_path contains the full real path
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of 'string'. The fake_name and real_name variables should always
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be the same, and contain the final file or directory name. The leading_dirs
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contain everything except the name, and the extra_path is everything
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from the / before "home" to the end of the leading_dirs. To better
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illustrate, here is an example:</P>
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<P>
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<PRE>
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$p = $GLOBALS['phpgw']->vfs->path_parts (array(
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'string' => '/home/jason/dir/file',
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'relatives' => array(
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RELATIVE_NONE
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)
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));
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</PRE>
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</P>
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<P>
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<UL>
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<LI>$p->fake_full_path - /home/jason/dir/file</LI>
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<LI>$p->fake_leading_dirs - /home/jason/dir</LI>
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<LI>$p->fake_extra_path - home/jason/dir</LI>
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<LI>$p->fake_name - file</LI>
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<LI>$p->real_full_path - /var/www/phpgroupware/files/home/jason/dir/file</LI>
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<LI>$p->real_leading_dirs - /var/www/phpgroupware/files/home/jason/dir
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</LI>
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<LI>$p->real_extra_path - home/jason/dir</LI>
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<LI>$p->real_name - file</LI>
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</UL>
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</P>
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<P>As you can see, path_parts () is a very useful function and will
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save you from doing those darn substr ()'s yourself. For those of
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you used to the prior VFS, note that <EM>getabsolutepath () is depreciated</EM>.
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getabsolutepath () still exists (albeit in a much different form),
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and is responsible for some of the path translation, but it is an
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<EM>internal</EM> function only. Applications should only use path_parts ().
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We have shown you how to use path_parts () so you can experiment
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with it using different paths and relativities as we explore relativity.</P>
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<H2><A NAME="sec:cd"></A> <A NAME="ss3.2">3.2</A> <A HREF="vfs.html#toc3.2">cd ()</A>
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</H2>
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<P>Part of the overall goal for the VFS in phpGroupWare is to give
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the user a seamless experience during their session. For example,
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if they upload a file using a file manager to the directory /home/my_group/project1,
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and then go to download an email attachment, the default directory
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will be /home/my_group/project1. This is accomplished using the cd
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() function. Examples: </P>
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<P>
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<PRE>
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/* cd to their home directory */
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$GLOBALS['phpgw']->vfs->cd (array(
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'string' => '/'
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));
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/* cd to /home/jason/dir */
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$GLOBALS['phpgw']->vfs->cd (array(
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'string' => '/home/jason/dir',
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'relative' => False,
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'relatives' => array(
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RELATIVE_NONE
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)
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));
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/* When following the above, cd's to /home/jason/dir/dir2 */
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$GLOBALS['phpgw']->vfs->cd (array(
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'string' => 'dir2',
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'relative' => True
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));
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</PRE>
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</P>
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<P>If 'relative' is True, the 'string' is simply appended to the
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current path. If you want to know what the current path is, use $GLOBALS['phpgw']->vfs->pwd
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().</P>
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<P>Now you're ready for relativity.</P>
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<HR>
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