EC-CUBE / ec-cube

        // 複数配送時は商品毎でお届け先を設定する為、商品をまとめた数量を設定

        $compItemQuantities = array();

        foreach ($Order->getShippings() as $Shipping) {

            foreach ($Shipping->getShipmentItems() as $ShipmentItem) {

                $itemId = $ShipmentItem->getProductClass()->getId();

                $quantity = $ShipmentItem->getQuantity();

                if (array_key_exists($itemId, $compItemQuantities)) {

                    $compItemQuantities[$itemId] = $compItemQuantities[$itemId] + $quantity;

                } else {

                    $compItemQuantities[$itemId] = $quantity;

                }

            }

        }

        // 商品に紐づく商品情報を取得

        $shipmentItems = array();

            foreach ($data as $mulitples) {

                /** @var \Eccube\Entity\ShipmentItem $multipleItem */

                $multipleItem = $mulitples->getData();

                foreach ($mulitples as $items) {

                    foreach ($items as $item) {

                        $quantity = $item['quantity']->getData();

                        $itemId = $multipleItem->getProductClass()->getId();

                        if (array_key_exists($itemId, $itemQuantities)) {

                            $itemQuantities[$itemId] = $itemQuantities[$itemId] + $quantity;

                        } else {

                            $itemQuantities[$itemId] = $quantity;

                        }

                    }

                }

            }

            foreach ($compItemQuantities as $key => $value) {