note 33786 added to ref.session

i was write a shopping cart script which use sessions. when i'm logged in, put some items in the cart then logout. i was looking: the session was succesfully destroyed with unset. But when i'm login again, i take the same session id!!! and i look the cart's content!! when i logout and login again why keep the session id? i need new session id. please help! ---- Manual Page -- http://www.php.net/manual/en/ref.session.php Edit Note -- http://master.php.net/manage/user-notes.php?action=edit+33786 Delete Note -- http://master.php.net/manage/user-notes.php?action=delete+33786&report=yes Reject Note -- http://master.php.net/manage/user-notes.php?action=reject+33786&report=yes