qd/app/api/common.php

<?php

// 应用公共文件
if (!function_exists('getNewOrderId')) {
    /**
     * 生成订单唯一id
     * @param $uid 用户uid
     * @return string
     */
    function getNewOrderId()
    {
        list($msec, $sec) = explode(' ', microtime());
        $msectime = number_format((floatval($msec) + floatval($sec)) * 1000, 0, '', '');
        $orderId = 'wx' . $msectime . mt_rand(10000, 99999);
        if (\app\models\auction\AuctionOrder::where('order_id', $orderId)) $orderId = 'wx' . $msectime . mt_rand(10000, 99999);
        return $orderId;
    }
}