Fatal error: Call to undefined method Facebook::require_login()-Collection of common programming errors

Have u downloaded the facebook.php? If then, u include those file in the page where u have called require login and create an object for that facebook class in facebook.php. Please check that facebook.php file whether it has a function related to reqire login. If not found download the latest version sdk and use it..

If u have any other doubt on this, please let me know it and i will try to explain u clearly. step by step… 🙂