PHP SESSION中的多维数组 [英] Multidimensional array in php SESSION

问题描述

我在用PHP的$_SESSION变量更新数组元素时遇到问题.这是基本结构:

I am having problem with updating an array element with in $_SESSION variable of PHP. This is the basic structure:

$product = array();
$product['id'] = $id;
$product['type'] = $type;
$product['quantity'] = $quantity;

然后使用array_push()函数将产品插入SESSION变量中.

And then by using array_push() function I insert that product in SESSION variable.

array_push($_SESSION['cart'], $product); 

现在这是我面临问题的主要部分:

Now this is the main part where i m facing problem:

foreach($_SESSION['cart'] as $product){

    if($id == $product['id']){
        $quantity = $product['quantity'];
        $quantity += 1;
        $product['quantity'] = $quantity;       
    }

}

我想增加$_SESSION['cart']变量中的产品数量.我该怎么办?

I want to increment product quantity within $_SESSION['cart'] variable. How can I do that?

推荐答案

不要盲目地将产品塞入您的会话中.使用产品的ID作为密钥，然后在购物车中查找/操作该物品很简单:

Don't blindly stuff the product into your session. Use the product's ID as the key, then it's trivial to find/manipulate that item in the cart:

$_SESSION['cart'] = array();
$_SESSION['cart'][$id] = array('type' => 'foo', 'quantity' => 42);

$_SESSION['cart'][$id]['quantity']++; // another of this item to the cart
unset($_SESSION['cart'][$id]); //remove the item from the cart

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