return to last page visited when session expired

tamayo

Hi, I need to redirect to last page visited when the session has expired, sometimes the users are working in a form or viewing some records, then the users receive a call or something, then when they want to continue the session has expired and then they have to login again. So, I want to remember the last page visited and after login go to it.

Now, when the session is active i always save the page's name in a SESSION var

if the session is expired, in the login.php page I put this code:

		if(isset($_SESSION[ 'pagbus' ])){
			$xpagina=$_SESSION[ 'pagbus' ];
            header('Location: $xpagina');
			}

but nothing happens, the user is always redirected to the main page.

my questions are:
1. when the session has expired, the global vars are deleted from memory?
2. to do this is better to use cookies instead of session vars?
3. can I recall session from the garbage collection?
4. is something wrong with my code?

regards

Bjom

1. when the session has expired, the global vars are deleted from memory?

No. They are gone as soon as your script ends. The garbage collector will delete the session file only. But...that doesnt help you a bit. You script doesnt run any more - so next time a user does anything, a new script runs, starts a session, doesn't find an existing one (i.e. a session file for the id it just received from the client) and starts a new one instead.
Whether or not the GC runs is chance based, btw and you can't rely on it.

2. to do this is better to use cookies instead of session vars?

Probably easier.

3. can I recall session from the garbage collection?

No. Once it's been deleted it's gone.
the garbage collector runs with a certain chance every time a session is started.

4. is something wrong with my code?

as you pointed out yourself....it doesnt do what you want 😉

hth

Bjom