Deleting Session On Closing Browser Tab

Hei all,,, please help me ,,, :happy:

1. How i can close opened tab / window (not popup) in firefox ...
2. Deleting session on this tab when we close it ...

My Logout script :

1. <? require_once("config.php");
   
2. $unique_id = session_id();
   
3. session_regenerate_id();
   
4. $qry="delete from cart_table where unique_id='$unique_id'";
   
5. mysql_query($qry);
   
6. $_SESSION = array();
   
7. session_unset();
   
8. session_destroy();
   
9. header("Location:index.php");
   
10. ?>

 

window.close() does not help you?
or
you don't want it in html?

deleting session on a tab?
that should happen