function.realpath.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Returns canonicalized absolute pathname</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.readlink.html">readlink</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.rename.html">rename</a></div> <div class="up"><a href="ref.filesystem.html">Filesystem Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.realpath" class="refentry"> <div class="refnamediv"> <h1 class="refname">realpath</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">realpath</span> — <span class="dc-title">Returns canonicalized absolute pathname</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>realpath</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$path</tt></span> )</div> <p class="para rdfs-comment"> <b>realpath()</b> expands all symbolic links and resolves references to '/./', '/../' and extra '/' characters in the input <i><tt class="parameter">path</tt></i>. and return the canonicalized absolute pathname. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">path</tt></i></span> <dd> <p class="para"> The path being checked. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the canonicalized absolute pathname on success. The resulting path will have no symbolic link, '/./' or '/../' components. </p> <p class="para"> <b>realpath()</b> returns <b><tt>FALSE</tt></b> on failure, e.g. if the file does not exist. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.3.0</td> <td colspan="1" rowspan="1" align="left"> Prior to this release <b>realpath()</b> would not fail on *BSD systems if only the last last <i><tt class="parameter">path</tt></i> component did not exist. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>realpath()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />chdir</span><span style="color: #007700">(</span><span style="color: #DD0000">'/var/www/'</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #DD0000">'./../../etc/passwd'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>/etc/passwd</pre></div> </pre></div> </div> <div class="example"> <p><b>Example #2 <b>realpath()</b> on Windows</b></p> <div class="example-contents"><p> On windows <b>realpath()</b> will change unix style paths to windows style. </p></div> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #DD0000">'/windows/system32'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>C:\WINDOWS\System32</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.basename.html" class="function" rel="rdfs-seeAlso">basename()</a></li> <li class="member"><a href="function.dirname.html" class="function" rel="rdfs-seeAlso">dirname()</a></li> <li class="member"><a href="function.pathinfo.html" class="function" rel="rdfs-seeAlso">pathinfo()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.readlink.html">readlink</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.rename.html">rename</a></div> <div class="up"><a href="ref.filesystem.html">Filesystem Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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