FF loses $_SESSION data

Question

Hello, I set an session variable in my index.php, say
session_start(); $_SESSION['test']='hello';
I call another skript on the server via AJAX that includes something like:
session_start(); echo ($_SESSION['test']);
This will result in the output of "hello" for some time.
I have a timer running to call the AJAX function every 20secs and sometimes after a few minutes, sometimes after a few hours, FF loses the session variable.
In other words, $_SESSION['test'] is not set anymore.
I can echo session_id(); and verify, that the session is still runing, so does the session cookie, but the complete $_SESSION array is lost.
Any ideas?
Regards, Chris.

Answer 1

It is my understanding that the browser's role is limited to sending the cookie. If the associated session gets messed up, that sounds like a server/PHP problem...
Do your logs show any unexpected requests for another script that could possibly affect $_SESSION['test']?
Edit: just noticed this post is a week old! This forum focuses on end-user support. You can find more web development help on the [http://forums.mozillazine.org/viewforum.php?f=25 mozillaZine Web Development board]. Separate forum, separate registration.