Yaron,The Lampshade framework handles this for you. Any given user for an application can only log in from one place at a time; otherwise they'll be signed out from all of their other sessions.
If you're interested, take a look: http://www.thinkcomputer.com/software/lampshade/free.html Aaron Aaron Greenspan President & CEO Think Computer Corporation http://www.thinkcomputer.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php