随机批号，随机UUID生成函数PHP

    /**
     * 生成 uuid v4
     * @return string
     */
    public static function uuidv4()
    {
        try {
            $data = random_bytes(16);
        } catch (\Exception $e) {
            AppHelper::systemLog($e);
            // 兜底：固定前缀+mt_rand，保持和uuid一样格式
            return sprintf('00000000-%04x-%04x-%04x-%08x%04x',
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffff),
                mt_rand(0, 0xffffffff),
                mt_rand(0, 0xffff)
            );
        }
        $data[6] = chr(ord($data[6]) & 0x0f | 0x40);
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80);
        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
    }

    /**
     * 生成随机的批次码
     * @param $prefix
     * @param $mode
     * @return string
     */
    public static function randomBatchCode($prefix = '', $mode = 1)
    {
        // UUID v4，标准唯一，无小数点
        $prefix = $prefix != '' ? $prefix . '-' : '';
        $str    = $prefix . self::uuidv4();
        if ($mode != 1) {
            return str_replace('-', '', $str);
        }
        return $str;
    }

    /**
     * 纯数字订单号: 雪花算法，时钟回拨时自动降级到时间随机方案兜底
     * @param string $prefix 订单号前缀
     * @param int $machineId 机器编号 0~31
     * @return string
     */
    public static function createOrderSn($prefix='', int $machineId = 1): string
    {
        static $lastTimestamp = 0;
        static $sequence = 0;
        $epoch = 1609459200000;

        $timestamp = (int)(microtime(true) * 1000);

        // 时钟回拨，直接降级简易方案，不报错
        if ($timestamp < $lastTimestamp) {
            return self::createOrderSnSimple($prefix);
        }

        if ($timestamp === $lastTimestamp) {
            $sequence = ($sequence + 1) & 4095;
            if ($sequence === 0) {
                usleep(1000);
                $timestamp = (int)(microtime(true) * 1000);
                // 再次判断回拨兜底
                if ($timestamp < $lastTimestamp) {
                    return self::createOrderSnSimple($prefix);
                }
            }
        } else {
            $sequence = 0;
        }
        $lastTimestamp = $timestamp;

        $timePart  = $timestamp - $epoch;
        $snowflake = ($timePart << 22) | ($machineId << 17) | $sequence;
        $snowflake = (string)$snowflake;
        return $prefix . $snowflake;
    }

    /**
     * 纯数字订单号生成函数(兜底方案)：毫秒时间 + 6位随机，纯数字，永远不会抛异常
     * @param string $prefix 订单号前缀
     * @return string
     */
    public static function createOrderSnSimple($prefix = ''): string
    {
        $ms = (string)(microtime(true) * 1000);
        $ms = explode('.', $ms)[0];
        try {
            $rand_number = random_int(0, 999999);
        } catch (\Exception $e) {
            //AppHelper::systemLog($e);
            $rand_number = mt_rand(0, 999999);
        }
        $rand = str_pad($rand_number, 6, '0', STR_PAD_LEFT);
        return $prefix . $ms . $rand;
    }

版权属于：Joyber

本文链接：https://blog.qqvbc.com/default/UUID-PHP.html

转载时须注明出处及本声明