<?php session_start () ; session_register ( "A" ) ; session_register ( "B" ) ; session_register ( "C" ) ; $A = "AAA"; $B = "BBB"; $C = "CCC"; $result = session_destroy () ; if ($result=1) { echo "The session is destroyed! " , "\n " ; } else { echo "The session could not be destroyed. " , " \n" ; } echo $pop; ?>