PHP：如何更新数组内的数组中的数据

Question

Following is my PHP code:

while($row = $resp->fetch_assoc())
{
    $itemArray = array(
      array(
        'name' => $row["product_name"],
        'id' => $row["id"],
        'image' => $row['images'],
        'discount' => $row["discount"],
        'quantity' => $min_quantity,
        'price' => $row["price"]
      )
    );
}

if(!empty($_SESSION["cart_item"]))
{
    if(in_array($itemArray, $_SESSION["cart_item"]))
    {
        foreach($_SESSION["cart_item"] as $item)
        {
            if(in_array($item, $itemArray))
                $_SESSION["cart_item"][$item]["quantity"] = $min_quantity;
            break;
        }
    }
    else
    {
        $_SESSION["cart_item"] = array_merge($_SESSION["cart_item"],$itemArray);
    }
}
else
{
    $_SESSION["cart_item"] = $itemArray;
}

After executing this code i am getting a response like this:

Array
(
[0] => Array
    (
        [name] => Girls Designer Dress
        [id] => 4
        [image] => s:146:"2017/march/meetfashion01-04-2017_12-19-07_am.jpg,2017/march/meetfashion01-04-2017_12-19-08_am
.jpg,2017/march/meetfashion01-04-2017_12-19-09_am.jpg";
        [discount] => 10
        [quantity] => 1
        [price] => 1200
    )

)

What I am trying to acheive is if user adds the same product in cart whose data we have got in response then instead of creating once more array and merging it one after another i want to just update the quantity of the same product from 1 to 2.

I am stuck in this part of code

foreach($_SESSION["cart_item"] as $item)
{
    if(in_array($item, $itemArray))
    $_SESSION["cart_item"][$item]["quantity"] = $min_quantity;
    break;
}

I have tried it many times that if same product is encountered then increment the quantity by 1 for the same product and don't create one more array.

Can anyone help with this logic and code?

Answer 1

is $_SESSION["cart-item"] a single Array like?

Array
(
    [name] => Girls Designer Dress
    [id] => 4
    [image] => s:146:"2017/march/meetfashion01-04-2017_12-19-07_am.jpg,2017/march/meetfashion01-04-2017_12-19-08_am
.jpg,2017/march/meetfashion01-04-2017_12-19-09_am.jpg";
    [discount] => 10
    [quantity] => 1
    [price] => 1200
)

If so then don't call a foreach instead just check directly if that cart-item is in the $itemArray using array_search().

(The function search in a array and if needle is found return its index else return false).

$cartItemPosition = array_search($_SESSION['cart-item'], $itemArray);

if($cartItemPosition == false) {
  // Not found in array, so create new entry
  $itemArray.push($_SESSION['cart-item']);

}else {
  // Found in array so edit existing entry

    $itemArray[$cartItemPosition]['quantity'] = 999;  
}