<?php
require_once 'client/facebook.php';
$appapikey = 'd9750a5976aa776dbdc1b48dc31920ee';
$appsecret = '6219a0b85473cff9dcbe154eb3d3b64e';
$facebook = new FacebookAPI($appapikey, $appsecret);
$user = $facebook->require_login();
//[todo: change the following url to your callback url]
#$appcallbackurl = 'http://wikidiy.com/facebook-platform/';
$appcallbackurl = 'http://www.wikihow.com/Special:Facebook';
//catch the exception that gets thrown if the cookie has an invalid session_key in it
try {
if (!$facebook->api_client->users_isAppAdded()) {
$facebook->redirect($facebook->get_add_url());
}
} catch (Exception $ex) {
//this will clear cookies for your application and redirect them to a login prompt
$facebook->set_user(null, null);
$facebook->redirect($appcallbackurl);
}
