Trying to integrate Facebook Authentication into a php web application

[ShaPOC]

Am trying to integrate facebook authentication into my php web application without using the JavaScript version.I have downloaded the php sdk.The basic example works perfectly and i can get the user's public accessible information with the below code. \[code\]$uid = $facebook->getUser();$user = $facebook->api('/me');\[/code\]However, when i try to request for extended permissions with the below code:\[code\]$api_call = $facebook->getLoginUrl(array('req_perms' => 'email,user_birthday,status_update,publish_stream,user_photos,user_videos')); header("Location: {$api_call}");\[/code\]It keeps loading on facebook with the "Redirecting" in the title bar.I will very much appreciate if someone can help me out with a link to a tutorial that can help me out.Thanks