class FatalErrorException extends Exception
    {
        const ERR_PREFIX = '<strong>FATAL ERROR:</strong> ';

        public function __destruct()
        {
            die(self::ERR_PREFIX . $this->error);
        }
    }

    class WarningException extends Exception
    {
        const ERR_PREFIX = '<strong>WARNING:</strong> ';

        public function __destruct()
        {
            echo self::ERR_PREFIX . $this->error;
        }
    }