session_unregister( ) unregisters (forgets ) the global variable named name from the current session .
הערה :
This function doesn ' t unset the corresponding global variable for name , it only prevents the variable from being saved as part of the session .
If you are using $HTTP_SESSION_VARS / $_SESSION , do not use session_register( ) , session_is_registered( ) and session_unregister( ) .