php-doc-en/reference/filesystem/functions/chgrp.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.chgrp">
 <refnamediv>
  <refname>chgrp</refname>
  <refpurpose>Changes file group</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>chgrp</methodname>
   <methodparam><type>string</type><parameter>filename</parameter></methodparam>
   <methodparam><type>mixed</type><parameter>group</parameter></methodparam>
  </methodsynopsis>
  <para>
   Attempts to change the group of the file <parameter>filename</parameter>
   to <parameter>group</parameter>.
  </para>
  <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.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>filename</parameter></term>
     <listitem>
      <para>
       Path to the file.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>group</parameter></term>
     <listitem>
      <para>
       A group name or number.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Changing a file's group</title>
    <programlisting role="php">
<![CDATA[
<?php
$filename = 'shared_file.txt';
$format = "%s's Group ID @ %s: %d\n";
printf($format, $filename, date('r'), filegroup($filename));
chgrp($filename, 8);
clearstatcache(); // do not cache filegroup() results
printf($format, $filename, date('r'), filegroup($filename));
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  &note.no-remote;
  &note.sm.uidcheck;
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>chown</function></member>
    <member><function>chmod</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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