PHP Sessions, and unregistering

[Anon]

I have a form that I want to over-write
session variables but for some reason the session variables don't get changed. Any ideas?

(more specifically, I start a session with a bunch of variables. Then I have a form where I allow people to change some of the variables. But when I send it to the database, some of the variables don't get changed from the form input. I've tried unregistering, but that deletes ALL the variables rather than just the ones I chose).

[Anon]

If your form variables are named the same as your session variables then you will always get the session variable in the script your form calls. This is because the PHP engine creates global variables from the POSTED variables, then your script calls session_start() or one of the other session functions, and this function overwrites the global variables with it's own. You need to re-overwrite the global variables with the ones that can be found in the $HTTP_POST_VARS, or $HTTP_GET_VARS arrays.