public static function deleteQuestionFile($id, $file)
 {
     session_start();
     $headers = apache_request_headers();
     $token = $headers['X-Auth-Token'];
     if (!$headers['X-Auth-Token']) {
         header('Invalid CSRF Token', true, 401);
         return print json_encode(array('success' => false, 'status' => 400, 'msg' => 'Invalid CSRF Token / Bad Request / Unauthorized ... Please Login again'), JSON_PRETTY_PRINT);
         die;
     } else {
         if ($token != $_SESSION['form_token']) {
             header('Invalid CSRF Token', true, 401);
             return print json_encode(array('success' => false, 'status' => 400, 'msg' => 'Invalid CSRF Token / Bad Request / Unauthorized ... Please Login again'), JSON_PRETTY_PRINT);
             die;
         } else {
             Questions::deleteQuestionFile($id);
         }
     }
 }