php-doc-en/reference/session/functions/session-status.xml

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<refentry xml:id="function.session-status" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>session_status</refname>
  <refpurpose>Returns the current session status</refpurpose>
 </refnamediv>

 <refsect1 role="description"><!-- {{{ -->
  &reftitle.description;
  <methodsynopsis role="procedural">
   <type>int</type><methodname>session_status</methodname>
   <void />
  </methodsynopsis>
  <para>
   <function>session_status</function> is used to return the current session status.
  </para>
 </refsect1><!-- }}} -->

 <refsect1 role="returnvalues"><!-- {{{ -->
  &reftitle.returnvalues;
  <para>
   <itemizedlist>
    <listitem>
     <simpara><constant>PHP_SESSION_DISABLED</constant> if sessions are disabled.</simpara>
    </listitem>
    <listitem>
     <simpara><constant>PHP_SESSION_NONE</constant> if sessions are enabled, but none exists.</simpara>
    </listitem>
    <listitem>
     <simpara><constant>PHP_SESSION_ACTIVE</constant> if sessions are enabled, and one exists.</simpara>
    </listitem>
   </itemizedlist>
  </para>
 </refsect1><!-- }}} -->
 
 <refsect1 role="seealso"><!-- {{{ -->
  &reftitle.seealso;
  <simplelist>
   <member><function>session_start</function></member>
  </simplelist>
 </refsect1><!-- }}} -->

</refentry>

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