当我多次单击“添加到购物车”时,我想增加产品数量,但是我没有增加数量,这是不变的,有人帮助我解决了这个问题。我在空白的其他部分中编码什么
if(isset($_POST["submit1"]))
{
if(isset($_SESSION["shopping_cart"]))
{
$item_array_id = array_column($_SESSION["shopping_cart"], "item_id");
if(!in_array($_GET["product_id"], $item_array_id))
{
$count = count($_SESSION["shopping_cart"]);
$item_array = array(
'item_id' => $_GET["product_id"],
'item_name' => $_POST["hidden_name"],
'item_price' => $_POST["hidden_price"],
'item_quantity' => $_POST["quantity"],
'item_image' => $_POST["hidden_image"],
);
$_SESSION["shopping_cart"][$count] = $item_array;
}
else
{
}
}
else
{
$item_array = array(
'item_id' => $_GET["product_id"],
'item_name' => $_POST["hidden_name"],
'item_price' => $_POST["hidden_price"],
'item_quantity' => $_POST["quantity"],
'item_image' => $_POST["hidden_image"],
);
$_SESSION["shopping_cart"][0] = $item_array;
}
}
答案 0 :(得分:1)
您可以使用array_search
来获得商品的钥匙,如下所示:
// look for 'item_id' with the value of $_GET["product_id"] inside of the cart
$itemIds = array_column( $_SESSION["shopping_cart"], "item_id" );
$key = array_search( $_GET["product_id"], $itemIds );
然后您可以通过执行以下操作轻松更新该项目的数量:
...
if (isset($_SESSION["shopping_cart"]))
{
// look for 'item_id' with the value of $_GET["product_id"] inside of the cart
$itemIds = array_column( $_SESSION["shopping_cart"], "item_id" );
$key = array_search( $_GET["product_id"], $itemIds );
if ( $key === false )
{
$item_array = array(
'item_id' => $_GET["product_id"],
'item_name' => $_POST["hidden_name"],
'item_price' => $_POST["hidden_price"],
'item_quantity' => $_POST["quantity"],
'item_image' => $_POST["hidden_image"],
);
$_SESSION["shopping_cart"][] = $item_array;
}
else
{
// if quantity is invalid do something, else
$_SESSION["shopping_cart"][$key]["item_quantity"] += $_POST["quantity"];
}
}
...
答案 1 :(得分:0)
您的程序逻辑正确,只需将其更新为:
$count++;
$_SESSION["shopping_cart"][$count] = $item_array;