lachang/app/api/model/member/MemberGoods.php

<?php

declare (strict_types=1);

namespace app\api\model\member;
use app\common\library\helper;
use app\common\model\member\MemberGoods as MemberGoodsModel;

/**
 * 会员卡
 * Class MemberCards
 * @package app\api\model
 */
class MemberGoods extends MemberGoodsModel
{

    public function getGoodsMemberPrice($id,$source_price){
        $member = MemberGoods::where('goods_id',$id)->where("status",0)->find();
        if($member){
            $t = helper::bcmul($source_price,$member->discount,3);
            //$member_price = helper::bcadd(($member->discount/100)*$source_price,0,2);
            return helper::bcadd(ceil($t)/100,0,2);
        }
        return null;
    }
}