[PHP] session_destroy()

[Nick Adams]

Just curious if anyone knows how to properly destroy a session.
I tried doing this,

session_start();

session_unregister("logged_in");
session_unregister("username");
session_unregister("password");
session_unregister("accesslevel");
session_unregister("emailaddress");
session_unregister("last_login");

session_destroy();

However that doesn't work, the session isn't terminated and the session variables are 
still available. Help anyone? :-)