Including global.php in non-VB page

[hamedatl]

I've been searching on the boards here for a while.. and have been doing some testing on my own. I'm just trying to do a simple check to see if the user is already logged in:

I have the following code:

PHP Code:

<?php
    error_reporting(E_ALL);
    chdir("forum/");
    include('./global.php');    
    include('./includes/functions_user.php');
//    echo "curr dir = " . getcwd();
//    echo " user = $vbulletin->userinfo['username']";
?>

But no matter what, I keep getting the following error:

Unable to add cookies, header already sent.
File:
Line: 0

From searching, it seems that error message should include the file, line, but it doesn't. I'm able to replace the includes with a PHP header('url') and it redirects fine... which is very weird.. I'm using IIS in case this matters.

Any clues? Thanks.

Blah, I removed error_reporting(E_ALL); and upgraded to 3.5 final from RC3 and now it all works.. weird