循環瀏覽2d會話數組購物車php

Question

我正在搭建購物車，想使用2D數組存儲商品ID和數量。 當用戶轉到購物車時，我希望能夠從數組中獲取商品ID，並從數據庫中輸出商品詳細信息

/**************** Adding to the 2d array ***********************/
    //Check to see if variable isset and then add item to shopping cart
    //$itemID is the ID of the product
    //$quantity is the quantity of the product they wish to order
    if(isset($_GET['add'])){
        $itemID = $_GET['add'];
        $quantity = $_POST['quantity'];
        $_SESSION['cart'][] = array("id" => $itemID,"quantity" => $quantity);
        header('xxx');//stops user contsanlty adding on refresh
    }

    /******************** Looping through the array  **********************/
        //need to loop through grab the item ID
        //then pull what we need from the database  

        //This is where I want to grab the id from the array and query the database

        $cart = $_SESSION['cart'];
        foreach ($cart as $value ){
        //works like it should
            foreach ( $value as $key=> $final_val ){
                echo $key;
                echo ':';
                echo $final_val;
                echo '<br/>';
            }
                echo '<br/>';
        }

數組輸出像這樣

id：1數量：5

id：2數量：1

我在弄清楚如何區分ID和數量方面有些麻煩，這樣我就可以使用項目ID來查詢數據庫。

Answer 1

foreach ( $value as $key=> $final_val ){
              if($key=='id')
              {
                echo $key;
                echo ':';
                echo $final_val;
                echo '<br/>';
              }
            }

或者您也可以直接使用$value['id']東西，這將對您有所幫助。請嘗試。 這是您需要的嗎？