php-doc-en/reference/session/sessionhandlerinterface/gc.xml

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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="sessionhandlerinterface.gc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>SessionHandlerInterface::gc</refname>
<refpurpose>Cleanup old sessions</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<modifier>public</modifier> <type class="union"><type>int</type><type>false</type></type><methodname>SessionHandlerInterface::gc</methodname>
<methodparam><type>int</type><parameter>max_lifetime</parameter></methodparam>
</methodsynopsis>
<para>
Cleans up expired sessions. Called by <function>session_start</function>,
based on <link linkend="ini.session.gc-divisor">session.gc_divisor</link>,
<link linkend="ini.session.gc-probability">session.gc_probability</link> and
<link linkend="ini.session.gc-maxlifetime">session.gc_maxlifetime</link> settings.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>max_lifetime</parameter></term>
<listitem>
<para>
Sessions that have not updated for the last <parameter>max_lifetime</parameter> seconds will be removed.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the number of deleted sessions on success, &return.falseforfailure;.
Note this value is returned internally to PHP for processing.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>7.1.0</entry>
<entry>
Prior to this version, the function returned &true; on success.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
</refentry>
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