[PHP] losing a session?

[Gerard L Petersen]

Hi 

Is it possible to lose a session?
For instance if on www.coke.com  $_SESSION['name'] = x; is set

and on www.pepsi.com $_SESSION['name'] = notX; is set.

Then i return to www.coke.com will $_SESSION['name'] == notX;

How does this work?

Thanks

-Gerard.