NN2022060401/app/common/service/Book.php

<?php
// +----------------------------------------------------------------------
// | 商城系统 [ 致力于通过产品和服务，帮助商家高效化开拓市场 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2017~2021 https://www.thinkphp.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed 这不是一个自由软件，不允许对程序代码以任何形式任何目的的再发行
// +----------------------------------------------------------------------
// | Author: thinkphp <admin@yiovo.com>
// +----------------------------------------------------------------------
declare (strict_types=1);

namespace app\common\service;

use app\store\model\User as UserModel;
use app\common\model\SpecialityBook as OrderModel;

/**
 * 报名订单服务类
 * Class Book
 * @package app\common\service
 */
class Book extends BaseService
{
    /**
     * 生成订单号`
     * @return string
     */
    public static function createOrderNo(): string
    {
        return date('Ymd') . substr(implode('', array_map('ord', str_split(substr(uniqid(), 7, 13), 1))), 0, 8);
    }

    /**
     * 事件：订单取消
     * @param OrderModel $order
     */
    public static function cancelEvent(OrderModel $order)
    {
        return true;
    }
}