PHP array_merge 隐藏坑。。

        foreach ($list as $k=> $teamGoods){
            if($teamGoods['status'] > 4){
                $_soldGoods[] = $teamGoods;
                unset($list[$k]);
            }
        }
        $list = array_merge($list, $_soldGoods);

 当没有状态为4的商品的时候合并数据 导致$list 为空

 以后还是先确定合并的参数为数组把。。 若类型果然坑人- -

 解决：

　　　　 $_soldGoods = array();
        foreach ($list as $k=> $teamGoods){
            if($teamGoods['status'] > 4){
                $_soldGoods[] = $teamGoods;
                unset($list[$k]);
            }
        }
        $list = array_merge($list, $_soldGoods);