PHP 生成UUID
    public static function  uuid_gen()
    {
        $chars = md5(uniqid(mt_rand(), true));
        $uuid = substr($chars, 0, 8) . '-'
            . substr($chars, 8, 4) . '-'
            . substr($chars, 12, 4) . '-'
            . substr($chars, 16, 4) . '-'
            . substr($chars, 20, 12);
        return $uuid;
    }
PHP 生成MAC地址
    /**
     * 生成MAC
     */
    public static function mac_gen()
    {
        $array = array(
            mt_rand(0x00, 0x7f),
            mt_rand(0x00, 0x7f),
            mt_rand(0x00, 0x7f),
            mt_rand(0x00, 0x7f),
            mt_rand(0x00, 0xff),
            mt_rand(0x00, 0xff)
        );
        return join(':', array_map(function ($v) {
            return sprintf("%02X", $v);
        }, $array));
    }