PHP统计订单商品数量：方法一与二实现

//获取每个订单下订单商品的数量（ 订单 - 订单商品： 1 - n ）
    public function test1(){
        list($order, $orderGoods) = $this->getData();
        $orderIds = array_column($order, 'id');
 
        $orderIdToName = array_column($order, 'name', 'id');
 
        //这里写了2种方法实现
        list($result, $haveGoodsOrderId, $handleOrderGoods) = $this->method1($orderGoods, $orderIdToName);
        //list($result, $haveGoodsOrderId, $handleOrderGoods) = $this->method2($orderGoods, $orderIdToName);
 
        //结果数据根据order_id升序
        $orderIdSort= array_column($result, 'order_id');
        array_multisort($orderIdSort, SORT_ASC, $result);
 
        //获取没有商品的订单数据
        $diffOrderIds = array_diff($orderIds, $haveGoodsOrderId);
        $diffOrderIds = array_values($diffOrderIds);    //索引重置
 
        $this->printData($order, $orderGoods, $handleOrderGoods, $result, $diffOrderIds);
    }
 
    //用1个for循环中处理，循环中用in_array()判断
    public function method1($orderGoods, $orderIdToName){
        $handleOrderGoods = []; //这个用不到了
        $result = $tempGoodsOrderId = $haveGoodsOrderId = [];
        foreach ($orderGoods as $value){    //根据订单ID合并订单商品
            $orderId = $value['order_id'];
            if (in_array($orderId, $tempGoodsOrderId)){ //订单有多个商品
                $orderIds = array_column($result, 'order_id');