Redirecting the logout to the custom page

When people logout of my site I want them to be redirected back to the homepage. How can I do that?

index.php

if(isset($_GET['mode']) and $_GET['mode']=='logout') {...

replace "Location: {$main_url}/{$indexphp}" to your desired URL.

I changed the line. However by doing that now the logout is redirected to a new page but does not log you out of the forum.

I wanted to log out of the forum and redirect to a new page.

Of course, you need to delete cookie correctly. See bb_cookie.php - deleteMyCookie()