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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/session.xml, last change in rev 1.8 -->
<refentry id="function.session-is-registered">
<refnamediv>
<refname>session_is_registered</refname>
<refpurpose>
Find out whether a global variable is registered in a session
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>bool</type><methodname>session_is_registered</methodname>
<methodparam><type>string</type><parameter>name</parameter></methodparam>
</methodsynopsis>
<para>
<function>session_is_registered</function> returns &true; if there
is a global variable with the name <parameter>name</parameter>
registered in the current session.
</para>
<note>
<para>
If <varname>$_SESSION</varname> (or
<varname>$HTTP_SESSION_VARS</varname> for PHP 4.0.6 or less) is
used, use <function>isset</function> to check a variable is
registered in <varname>$_SESSION</varname>.
</para>
</note>
<caution>
<para>
If you are using
<varname>$_SESSION</varname> (or <varname>$HTTP_SESSION_VARS</varname>),
do not use <function>session_register</function>,
<function>session_is_registered</function> and
<function>session_unregister</function>.
</para>
</caution>
</refsect1>
</refentry>
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