protected function concatMessage($buffer)
    {
        $messages = [];
        $buffer = array_slice($buffer, 2);
        $message = stripcslashes($buffer[0][1]);
        $messages[] = mb_substr($message, 1, mb_strlen($message) - 2);
        if (isset($buffer[1], $buffer[2][0]) && $buffer[1] === '.' && $buffer[2][0] == T_CONSTANT_ENCAPSED_STRING) {
            $messages = array_merge_recursive($messages, $this->concatMessage($buffer));
        }

        return $messages;
    }