extended permission using php sdk

Question

I am developing a facebook application using php-sdk. i want to take some extended permissions from user of my application. As this is application where user comes after login i

Answer 1

check this

` $value) { 
if ($key != "sig") { 
$payload .= $key . "=" . $value; 
} 
} 
if (md5($payload . $application_secret) != $args["sig"]) {
return null; 
} 
return $args; 
} 
$cookie = get_facebook_cookie($app_id, $app_sec); 
?>