note 8378 added to session_destroy

How to destroy session for sure ? Can anybody tell me, how to destroy one session and start a new one in, all that in one script ? When I call like this: <? session_start(); // old one session_destroy; // should destroy all data session_start(); // should be a new one the new one has the same ID and data like the old one. Thanks http://www.php.net/manual/function.session-destroy.php