qyadmin/app/Service/OrderNoService.php

<?php

namespace App\Service;

class OrderNoService extends Service
{
    public static function createOrderNumber($prefix = "") {
        // 获取当前时间的微秒级时间戳
        list($micro, $seconds) = explode(' ', microtime());
        // 从微秒部分截取全部6位作为唯一标识符
        $microSuffix = substr($micro, 2, 6);

        return $prefix . date('YmdHis', $seconds) . $microSuffix;
    }
}