session_destroy() - what this function really do?

Hello All, I have problem using session_destroy. I don't know what this function really do. Manual says: "Destroys all data registered to a session" what I think means that all registered data will be wiped out from session. But it looks like it is not true. I call session_destroy and still have variables registered in session. I've read mails from this list about session handling and almost in all answers was said that before destroying session I should unregister/unset all variables. But if I clear all variables, what will give me destroying session? Any ideas will be very helpful. Thanks. -- Sebastian Baran, Poland mailto:sebab@info.com.pl