/*
* LOGOUT
*/
if(isset($_GET['logout']) and isset($_SESSION['loggedin'])) {
$_SESSION = array();
session_destroy();
}
if(isset($_GET['signin'])) {
# STEP 1: Redirect user to Facebook, to grant permission for our application
$url = 'https://graph.facebook.com/oauth/authorize?' . xhttp::toQueryString(array(
'client_id' => $client_id,
'redirect_uri' => $callbackURL,
'scope' => $extendedPermissions,
));
header("Location: $url", true, 303);
die();
}
if(isset($_GET['code'])) {
# STEP 2: Exchange the code that we have for an access token
$data = array();
$data['get'] = array(
'client_id' => $client_id,
'client_secret' => $client_secret,
'code' => $_GET['code'],
'redirect_uri' => $callbackURL,
