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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.12 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.session-unset">
<refnamediv>
<refname>session_unset</refname>
<refpurpose>Free all session variables</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>void</type><methodname>session_unset</methodname>
<void/>
</methodsynopsis>
<para>
The <function>session_unset</function> function frees all session variables
currently registered.
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
If <varname>$_SESSION</varname> (or <varname>$HTTP_SESSION_VARS</varname>
for PHP 4.0.6 or less) is used, use <function>unset</function> to
unregister a session variable, i.e.
<literal>unset ($_SESSION['varname']);</literal>.
</para>
</note>
<caution>
<para>
Do NOT unset the whole <varname>$_SESSION</varname> with
<literal>unset($_SESSION)</literal> as this will disable the registering
of session variables through the <varname>$_SESSION</varname> superglobal.
</para>
</caution>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->
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