如何更新Laravel会话数组中的单个值？

Question

I have a Session array like this:

[
    {
        "itemId": "1",
        "itemQuantity": "3",
        "itemName": "Item_name1"
    },
    {
        "itemId": "2",
        "itemQuantity": "2",
        "itemName": "Item_name2"
    }
]

How can I update the quantity of a single item if I know the itemId ?

I know that one way of doing this would be to fetch the whole array, loop through the array, make the updates and 'put' the entire array back into the session. Is this the only way?

I'm a beginner. Please help out. Thanks.

Answer 1

Objects are passed by reference so you can simply do this.

foreach(Session::get('cart') as $item) {
    if ($item->itemId == '2') { // say we  want to double the quantity for itemId 2
        $item->itemQuantity = $item->itemQuantity * 2;
        break;
    }
}
dd(Session::get('cart'));

Output:

array:2 [▼
  0 => {#162 ▼
    +"itemId": "1"
    +"itemQuantity": "3"
    +"itemName": "Item_name1"
  }
  1 => {#163 ▼
    +"itemId": "2"
    +"itemQuantity": 4  <<--- the quantity has been doubled
    +"itemName": "Item_name2"
  }
]