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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.session-cache-expire" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>session_cache_expire</refname>
<refpurpose>Get and/or set current cache expire</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>int</type><type>false</type></type><methodname>session_cache_expire</methodname>
<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>value</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
<function>session_cache_expire</function> returns the current setting of
<literal>session.cache_expire</literal>.
</para>
<para>
The cache expire is reset to the default value of 180 stored in
<link linkend="ini.session.cache-expire">session.cache_expire</link>
at request startup time. Thus,
you need to call <function>session_cache_expire</function> for every
request (and before <function>session_start</function> is called).
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
If <parameter>value</parameter> is given and not &null;, the current cache
expire is replaced with <parameter>value</parameter>.
</para>
<para>
<note>
<simpara>
Setting <parameter>value</parameter> is of value only, if
<literal>session.cache_limiter</literal> is set to a value
<emphasis>different</emphasis> from <literal>nocache</literal>.
</simpara>
</note>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the current setting of <literal>session.cache_expire</literal>.
The value returned should be read in minutes, defaults to 180.
On failure to change the value, &false; is returned.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>value</parameter> is nullable now.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>session_cache_expire</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
/* set the cache limiter to 'private' */
session_cache_limiter('private');
$cache_limiter = session_cache_limiter();
/* set the cache expire to 30 minutes */
session_cache_expire(30);
$cache_expire = session_cache_expire();
/* start the session */
session_start();
echo "The cache limiter is now set to $cache_limiter<br />";
echo "The cached session pages expire after $cache_expire minutes";
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><link linkend="ini.session.cache-expire">session.cache_expire</link></member>
<member><link linkend="ini.session.cache-limiter">session.cache_limiter</link></member>
<member><function>session_cache_limiter</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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