<HTML ><HEAD ><TITLE >session_unset</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Session handling functions" HREF="ref.session.html"><LINK REL="PREVIOUS" TITLE="session_unregister" HREF="function.session-unregister.html"><LINK REL="NEXT" TITLE="session_write_close" HREF="function.session-write-close.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.session-unregister.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.session-write-close.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.session-unset" ></A >session_unset</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN84791" ></A ><P > (PHP 4 )</P >session_unset -- Free all session variables </DIV ><DIV CLASS="refsect1" ><A NAME="AEN84794" ></A ><H2 >Description</H2 >void <B CLASS="methodname" >session_unset</B > ( void)<BR ></BR ><P > The <B CLASS="function" >session_unset()</B > function frees all session variables currently registered. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > If <TT CLASS="varname" >$_SESSION</TT > (or <TT CLASS="varname" >$HTTP_SESSION_VARS</TT > for PHP 4.0.6 or less) is used, use <A HREF="function.unset.html" ><B CLASS="function" >unset()</B ></A > to unregister session variable. i.e. $_SESSION = array(); </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.session-unregister.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.session-write-close.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >session_unregister</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.session.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >session_write_close</TD ></TR ></TABLE ></DIV ></BODY ></HTML >