Destroy PHP session on page leaving

Question

I need to destroy a session when user leave from a particular page. I use session_destroy() on the end of the page but its not feasible for me because my page h

Answer 1

I solve the problem.First take the current url then chk the page stay on current url.if page is not in the current url then destroy the session.

$url = "http" . ((!empty($_SERVER['HTTPS'])) ? "s" : "") . "://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
$page_name="abc.php";      
if (!preg_match("/$page_name/",$url)) 
 {
  session_destroy();
 } 

But this code should be used on another pages.Because http is a stateless processes so no way to find when a user leave the page.