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</div><hr /><div id="function.chgrp" class="refentry">
<div class="refnamediv">
<h1 class="refname">chgrp</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">chgrp</span> — <span class="dc-title">Changes file group</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.chgrp-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>chgrp</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$group</code></span>
)</div>
<p class="para rdfs-comment">
Attempts to change the group of the file <em><code class="parameter">filename</code></em>
to <em><code class="parameter">group</code></em>.
</p>
<p class="para">
Only the superuser may change the group of a file arbitrarily; other users
may change the group of a file to any group of which that user is a member.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.chgrp-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">
Path to the file.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">group</code></em></span>
<dd>
<p class="para">
A group name or number.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.chgrp-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.chgrp-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2349">
<p><strong>Example #1 Changing a file's group</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$filename </span><span style="color: #007700">= </span><span style="color: #DD0000">'shared_file.txt'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$format </span><span style="color: #007700">= </span><span style="color: #DD0000">"%s's Group ID @ %s: %d\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #0000BB">$format</span><span style="color: #007700">, </span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'r'</span><span style="color: #007700">), </span><span style="color: #0000BB">filegroup</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">chgrp</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">8</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">clearstatcache</span><span style="color: #007700">(); </span><span style="color: #FF8000">// do not cache filegroup() results<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #0000BB">$format</span><span style="color: #007700">, </span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'r'</span><span style="color: #007700">), </span><span style="color: #0000BB">filegroup</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.chgrp-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">This function will not work on
<a href="features.remote-files.html" class="link">remote files</a> as the file to
be examined must be accessible via the server's filesystem.</span></p></blockquote>
<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">When <a href="features.safe-mode.html" class="link">safe mode</a> is enabled, PHP checks whether
the files or directories being operated upon have the same UID (owner) as the
script that is being executed.</span></p></blockquote>
</div>
<div class="refsect1 seealso" id="refsect1-function.chgrp-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.chown.html" class="function" rel="rdfs-seeAlso">chown()</a> - Changes file owner</span></li>
<li class="member"> <span class="function"><a href="function.chmod.html" class="function" rel="rdfs-seeAlso">chmod()</a> - Changes file mode</span></li>
</ul>
</p>
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