📄 function.opendir.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>Open directory handle</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.getcwd.html">getcwd</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.readdir.html">readdir</a></div> <div class="up"><a href="ref.dir.html">Directory Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.opendir" class="refentry"> <div class="refnamediv"> <h1 class="refname">opendir</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">opendir</span> — <span class="dc-title">Open directory handle</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>opendir</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$path</tt></span> [, <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$context</tt></span> ] )</div> <p class="para rdfs-comment"> Opens up a directory handle to be used in subsequent <a href="function.closedir.html" class="function">closedir()</a>, <a href="function.readdir.html" class="function">readdir()</a>, and <a href="function.rewinddir.html" class="function">rewinddir()</a> calls. </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 directory path that is to be opened </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">context</tt></i></span> <dd> <p class="para"> For a description of the <i><tt class="parameter">context</tt></i> parameter, refer to <a href="ref.stream.html" class="link">the streams section</a> of the manual. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a directory handle <a href="language.types.resource.html" class="type resource">resource</a> on success, or <b><tt>FALSE</tt></b> on failure. </p> <p class="para"> If <i><tt class="parameter">path</tt></i> is not a valid directory or the directory can not be opened due to permission restrictions or filesystem errors, <b>opendir()</b> returns <b><tt>FALSE</tt></b> and generates a PHP error of level <a href="errorfunc.constants.html" class="link"> E_WARNING</a>. You can suppress the error output of <b>opendir()</b> by prepending '<a href="language.operators.errorcontrol.html" class="link">@</a>' to the front of the function name. </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">5.0.0</td> <td colspan="1" rowspan="1" align="left"> <i><tt class="parameter">path</tt></i> supports the <i>ftp://</i> URL wrapper. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.3.0</td> <td colspan="1" rowspan="1" align="left"> <i><tt class="parameter">path</tt></i> can also be any URL which supports directory listing, however only the <i>file://</i> URL wrapper supports this in PHP 4 </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>opendir()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$dir </span><span style="color: #007700">= </span><span style="color: #DD0000">"/etc/php5/"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Open a known directory, and proceed to read its contents<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">is_dir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir</span><span style="color: #007700">)) {<br /> if (</span><span style="color: #0000BB">$dh </span><span style="color: #007700">= </span><span style="color: #0000BB">opendir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir</span><span style="color: #007700">)) {<br /> while ((</span><span style="color: #0000BB">$file </span><span style="color: #007700">= </span><span style="color: #0000BB">readdir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dh</span><span style="color: #007700">)) !== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"filename: $file : filetype: " </span><span style="color: #007700">. </span><span style="color: #0000BB">filetype</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir </span><span style="color: #007700">. </span><span style="color: #0000BB">$file</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">closedir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dh</span><span style="color: #007700">);<br /> }<br />}<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>filename: . : filetype: dirfilename: .. : filetype: dirfilename: apache : filetype: dirfilename: cgi : filetype: dirfilename: cli : filetype: dir</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.is-dir.html" class="function" rel="rdfs-seeAlso">is_dir()</a></li> <li class="member"><a href="function.readdir.html" class="function" rel="rdfs-seeAlso">readdir()</a></li> <li class="member"><a href="class.dir.html" class="link">Dir</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.getcwd.html">getcwd</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.readdir.html">readdir</a></div> <div class="up"><a href="ref.dir.html">Directory 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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