Killing sessions

[Reformed]

I was wondering how some of you developers kill a session after displaying a page. I have a validation function and a return page function that both rely on sessions that need to exist only prior to displaying one page and then they need to be imediately destroyed. Here is an example:

//if errors exist, redisply the form with error messages
			if($fv->isError()) {

			//get the error list
			$errors = $fv->getErrorList();

			//register an error session
			$_SESSION['valError'] = $errors;

			$prevPage = $_SESSION['prevPage'];

			//send user to the page
			header("location:$prevPage");

$_SESSION['valError'] = null;
$_SESSION['prevPage']= null;

		    exit();

See, the problem is the session are killed before the page is displayed. I want to show the page and then kill the sessions. Any advice would be apriceated. Thanks.

[devinemke]

can't you simply call session_destroy() after showing the page?

[Reformed]

I think you could do that if you are using register globals on, but now with that option turned off. The way to do it without having register globals on is to make the session null, as far as I understand.

[LordShryku]

It destyroys the session, just doesn't unset the global session variables. The way around that is

$_SESSION = array();
session_destroy();