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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<!-- splitted from ./en/functions/session.xml, last change in rev 1.2 -->
<refentry id="function.session-name">
<refnamediv>
<refname>session_name</refname>
<refpurpose>Get and/or set the current session name</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>string</type><methodname>session_name</methodname>
<methodparam choice="opt"><type>string</type><parameter>name</parameter></methodparam>
</methodsynopsis>
<para>
<function>session_name</function> returns the name of the current
session. If <parameter>name</parameter> is specified, the name of
the current session is changed to its value.
</para>
<para>
The session name references the session id in cookies and
URLs. It should contain only alphanumeric characters; it should
be short and descriptive (i.e. for users with enabled cookie
warnings). The session name is reset to the default value
stored in <literal>session.name</literal> at request startup
time. Thus, you need to call <function>session_name</function>
for every request (and before <function>session_start</function>
or <function>session_register</function> are called).
</para>
<warning>
<para>
The session name can't consist of digits only, at least one letter must
be present. Otherwise a new session id is generated every time.
</para>
</warning>
<example>
<title><function>session_name</function> examples</title>
<programlisting role="php">
<![CDATA[
<?php
/* set the session name to WebsiteID */
$previous_name = session_name("WebsiteID");
echo "The previous session name was $previous_name<br />";
?>
]]>
</programlisting>
</example>
<para>
See also the <link linkend="ini.session.name">session.name</link>
configuration directive.
</para>
</refsect1>
</refentry>
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