SmsModel::lock PHP Method

    protected function lock()
    {
        $lockName = 'captcha_lock_' . $this->phone;
        $lickTime = $_SESSION[$lockName];
        if ($lickTime > time()) {
            $this->setMessage('请不要频繁发送，' . ($lickTime - time()) . '秒再试。');
            return true;
        }
        return false;
    }