public static function checkRegistration() { $rules = ['email' => FILTER_SANITIZE_SPECIAL_CHARS, 'key' => FILTER_SANITIZE_STRING]; $data = filter_input_array(INPUT_GET, $rules); $mail = urldecode($data['email']); $activation_key = urldecode($data['key']); return Activation::checkActivationCode($mail, $activation_key); }