Question

我是饼干的新手是我如何设置和检索数据

if(!isset($_COOKIE['cart'])){
$_COOKIE['cart'] = array();
}

setcookie("cart[$stk_id]['name']", $name, time()+24*60*60, "/");
setcookie("cart[$stk_id]['quantity']", $qty, time()+24*60*60, "/");
setcookie("cart[$stk_id]['vendor']", $vendor, time()+24*60*60, "/");

foreach ($_COOKIE['cart'] as $stk_id => $product){
    $qty = $product['quantity'];
    $pro_name = $product['name'];
}

但我收到错误提示：未定义的索引：数量和名称。有什么问题？

Answer 1

Cookies数组存储通常由一次变量使用，你在数组中设置cookie名称，但是先创建数组，然后设置cookie名称更方便。在这里你可以设置json_encode和json_decode

$data = array($stk_id => 
              array(
                   "name" => $name,
                   "quantity" => $qty,
                   "vendor" => $vendor
                   )
             );
setcookie("cart", json_encode($data), time()+24*60*60, "/");   
$cookie = json_decode($_COOKIE['cart'],true);//for array output

foreach ($cookie as $stk_id => $product){
            $qty = $product['quantity'];
            $pro_name = $product['name'];
}

无法从多维数组中检索cookie数据

1 个答案: