📄 function.xattr-supported.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>Check if filesystem supports extended attributes</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="ref.xattr.html">xattr Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.xdiff.html">xdiff</a></div> <div class="up"><a href="ref.xattr.html">xattr Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.xattr-supported" class="refentry"> <div class="refnamediv">  <h1 class="refname">xattr_supported</h1>  <p class="verinfo">(PECL xattr:1.0)</p><p class="refpurpose"><span class="refname">xattr_supported</span> &mdash; <span class="dc-title">   Check if filesystem supports extended attributes  </span></p> </div> <div class="refsect1 description">  <h3 class="title">Description</h3>  <div class="methodsynopsis dc-description">   <span class="type">bool</span> <span class="methodname"><b><b>xattr_supported</b></b></span>    ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$filename</tt></span>   [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$flags</tt></span>  ] )</div>  <p class="para rdfs-comment">   This functions checks if the filesystem holding the given file supports    extended attributes. Read access to the file is required.  </p> </div> <div class="refsect1 parameters">  <h3 class="title">Parameters</h3>  <p class="para">   <dl>    <dt>     <span class="term"><i><tt class="parameter">filename</tt></i></span>     <dd>      <p class="para">       The path of the tested file.      </p>     </dd>    </dt>    <dt>     <span class="term"><i><tt class="parameter">flags</tt></i></span>     <dd>      <p class="para">       <table border="5">        <caption><b>Supported xattr flags</b></caption>        <colgroup>         <tbody valign="middle" class="tbody">          <tr valign="middle">           <td colspan="1" rowspan="1" align="left"><b><tt>XATTR_DONTFOLLOW</tt></b></td>           <td colspan="1" rowspan="1" align="left">Do not follow the symbolic link but operate on symbolic link itself.</td>          </tr>         </tbody>        </colgroup>       </table>      </p>     </dd>    </dt>   </dl>  </p> </div> <div class="refsect1 returnvalues">  <h3 class="title">Return Values</h3>  <p class="para">   This function returns <b><tt>TRUE</tt></b> if filesystem supports extended attributes,   <b><tt>FALSE</tt></b> if it doesn&#039;t and <b><tt>NULL</tt></b> if it can&#039;t be determined (for example   wrong path or lack of permissions to file).  </p> </div> <div class="refsect1 examples">  <h3 class="title">Examples</h3>  <p class="para">   <div class="example">    <p><b>Example #1 <b>xattr_supported()</b> example</b></p>    <div class="example-contents"><p>     The following code checks if we can use extended attributes.    </p></div>    <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />$file&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'some_file'</span><span style="color: #007700">;<br /><br />if&nbsp;(</span><span style="color: #0000BB">xattr_supported</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*&nbsp;...&nbsp;make&nbsp;use&nbsp;of&nbsp;some&nbsp;xattr_*&nbsp;functions&nbsp;...&nbsp;*/<br /></span><span style="color: #007700">}<br /><br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>    </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.xattr-get.html" class="function" rel="rdfs-seeAlso">xattr_get()</a></li>    <li class="member"><a href="function.xattr-list.html" class="function" rel="rdfs-seeAlso">xattr_list()</a></li>   </ul>  </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.xattr.html">xattr Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.xdiff.html">xdiff</a></div> <div class="up"><a href="ref.xattr.html">xattr Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>
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