Logout Button

[tomyknoker]

I have a logout button with that links to the following page which contains:

<?php 
//log out// 
unset($_SESSION['blnUserLoggedIn']); 
//session_destroy(); 
header('Location: welcome.htm'); 
?>

But when you get re-directed back to the welcome page, the user is still logged in... Any ideas?

[tech_support]

Have you called session_start() before session_destroy()?

[tomyknoker]

Yea I call it on a page called top.php, then this has a logout button which links to logout.php which has the above... When the user clicks it redirects to another page called bottom.php... If I change the re-direct page to top.php, it's still logged in... When I remove the comments around session_destroy() I get the following:

Warning: session_destroy() [function.session-destroy]: Trying to destroy uninitialized session in /home/logout.php on line 5

Warning: Cannot modify header information - headers already sent by (output started at /home/html/logout.php:5) in /homel/logout.php on line 6

[tech_support]

Try calling:

session_start();
session_destroy(); 

on a separate file and see if it logs you out.

[tomyknoker]

It just says now:

Warning: session_destroy() [function.session-destroy]: Trying to destroy uninitialized session in /home/html/logout.php on line 5

Warning: Cannot modify header information - headers already sent by (output started at /home/html/logout.php:5) in /home/html/logout.php on line 6

[tech_support]

Did you have any HTML code in that file? Just put <?php session_start(); session_destroy(); ?> and nothing else in that file.