$goods_id = (int)$goods_id;        // 先从COOKIE中取出这前浏览过的商品        $goods = cookie(‘beforeViewGoods‘); // 1,2,3,4,5        $goods = explode(‘,‘, $goods);        // 把当前浏览的商品放到数组中的第一个位置上        array_unshift($goods, $goods_id);        // 去重        $goods = array_unique($goods);        if(count($goods) > 5)        {            $goods = array_splice($goods, 0, 5);        }        $goods = implode(‘,‘, $goods);        $goods = trim($goods, ‘,‘);