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Laravel+redis generates an order number - automatically increase from 1 on the same day

2022-07-01 01:34:00 【Know the black and accept the white】

<?php
use Illuminate\Support\Facades\Redis;

/** *  Generate order number  * - Day from 1 Start to grow  * - The order number looks like ：20190604000001 * @param Client $redis * @param $key * @param $back： Serial number fallback , If the order creation fails , Transaction rollback available  * @return string */
public static function createOrderSn($key, $back=