PHP 更新购物车数组

Question

基本上，我一直在为 Shop 类编写一个 UpdateCart 函数。这个想法是购物车是一个会话数组，将一个项目作为一个新数字添加到一个数组中，如array(1 => array(), 2 = array() 等等。

public function updateCart($ID, $Proc) {
    switch($Proc) {
        case $Proc = "Add" :
            try {
                $item = $this->_db->get("Shop","WHERE $ID = id");
                $this->cartArray[ count($this->cartArray) + 1 ] = array (
                    "ID" => $item['id'],
                    "Name" => $item['name'],
                    "Desc" => $item['desc'],
                    "Price" => $item['price']
                );
                session::put('ShoppingCart', $this->cartArray);
                print_r($_SESSION['ShoppingCart']);
            } catch(Exception $e) {
                die("No Item with That ID Found");
            }
            break;
        case $Proc = "Remove" :
            echo "Item ".$item['ID']." Removed";

            break;
        default:
            echo "Nothing to do";
            break;
    }
}

唯一的问题是它不会添加到数组中，它只是完全替换，我正在绞尽脑汁找出原因。

Answer 1

每次调用 put 时都会覆盖数组，请尝试 push。

public function updateCart($ID, $Proc)
{
    switch ($Proc) {
        case $Proc = "Add" :
            try {
                $item = $this->_db->get("Shop", "WHERE $ID = id");
                $this->cartArray[] = array(
                    "ID" => $item['id'],
                    "Name" => $item['name'],
                    "Desc" => $item['desc'],
                    "Price" => $item['price']
                );
                session::push('ShoppingCart', $this->cartArray);
                print_r($_SESSION['ShoppingCart']);
            } catch (Exception $e) {
                die("No Item with That ID Found");
            }
            break;
        case $Proc = "Remove" :
            echo "Item " . $item['ID'] . " Removed";
            break;
        default:
            echo "Nothing to do";
    }
}

如果这也不起作用，请在使用 put 时尝试合并它

public function updateCart($ID, $Proc)
{
    switch ($Proc) {
        case $Proc = "Add" :
            try {
                $item = $this->_db->get("Shop", "WHERE $ID = id");
                $this->cartArray[] = array(
                    "ID" => $item['id'],
                    "Name" => $item['name'],
                    "Desc" => $item['desc'],
                    "Price" => $item['price']
                );
                session::put('ShoppingCart', array_merge(session::get('ShoppingCart'), $this->cartArray));
                print_r($_SESSION['ShoppingCart']);
            } catch (Exception $e) {
                die("No Item with That ID Found");
            }
            break;
        case $Proc = "Remove" :
            echo "Item " . $item['ID'] . " Removed";
            break;
        default:
            echo "Nothing to do";
    }
}