PHP7.2 不再提供 mcrypt 了？

http://php.net/manual/en/intro.mcrypt.php
官方建議使用 Sodium 或 OpenSSL 取代

/**
     * @description DES加密
     *
     * @param $encryString
     * @param $encryKey
     *
     * @return string
     */
    private function encryPwd($encryString, $encryKey)
    {
        $keyLen   = strlen($encryKey);
        if (null == $encryKey || $keyLen < 8) {
            $encryKey = str_pad($encryKey, 8, '0', STR_PAD_RIGHT);
        }
        if ($keyLen > 8) {
            $encryKey = substr($encryKey, 0, 8);
        }
        $key     = mb_convert_encoding($encryKey, 'UTF-8');
        $message = mb_convert_encoding($encryString, 'UTF-8');
        $encry   = openssl_encrypt($message, 'DES-CBC', $key, OPENSSL_RAW_DATA, $key);

        return base64_encode($encry);
    }