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<title>Get an extended attribute</title>
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</div><hr /><div id="function.xattr-get" class="refentry">
<div class="refnamediv">
<h1 class="refname">xattr_get</h1>
<p class="verinfo">(PECL xattr >= 0.9.0)</p><p class="refpurpose"><span class="refname">xattr_get</span> — <span class="dc-title">
Get an extended attribute
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.xattr-get-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>xattr_get</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$name</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = 0</span></span>
] )</div>
<p class="para rdfs-comment">
This function gets the value of an extended attribute of a file.
</p>
<p class="para">Extended attributes have two different namespaces: user
and root. The user namespace is available to all users, while the root namespace
is available only to users with root privileges. xattr operates on the user
namespace by default, but this can be changed with the
<em><code class="parameter">flags</code></em> parameter.</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.xattr-get-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">filename</code></em></span>
<dd>
<p class="para">
The file from which we get the attribute.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">name</code></em></span>
<dd>
<p class="para">
The name of the attribute.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">flags</code></em></span>
<dd>
<p class="para">
<table class="doctable table">
<caption><strong>Supported xattr flags</strong></caption>
<tbody class="tbody">
<tr>
<td><strong><code>XATTR_DONTFOLLOW</code></strong></td>
<td>Do not follow the symbolic link but operate on symbolic link itself.</td>
</tr>
<tr>
<td><strong><code>XATTR_ROOT</code></strong></td>
<td>Set attribute in root (trusted) namespace. Requires root privileges.</td>
</tr>
</tbody>
</table>
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.xattr-get-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns a string containing the value or <strong><code>FALSE</code></strong> if the attribute doesn't
exist.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.xattr-get-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2444">
<p><strong>Example #1 Checks if system administrator has signed the file</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">'/usr/local/sbin/some_binary'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$signature </span><span style="color: #007700">= </span><span style="color: #0000BB">xattr_get</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">, </span><span style="color: #DD0000">'Root signature'</span><span style="color: #007700">, </span><span style="color: #0000BB">XATTR_ROOT</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* ... check if $signature is valid ... */<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.xattr-get-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.xattr-list.html" class="function" rel="rdfs-seeAlso">xattr_list()</a> - Get a list of extended attributes</span></li>
<li class="member"> <span class="function"><a href="function.xattr-set.html" class="function" rel="rdfs-seeAlso">xattr_set()</a> - Set an extended attribute</span></li>
<li class="member"> <span class="function"><a href="function.xattr-remove.html" class="function" rel="rdfs-seeAlso">xattr_remove()</a> - Remove an extended attribute</span></li>
</ul>
</p>
</div>
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