Delete Multidimensional Array Item By Values In the Item

Question

Hey guys I have this array :

Array
(
    [qty] => 1
    [id] => 2
    [name] => sallate me gjera plot 
    [price] => 8
    [category_id] => 25
    [dish_name] => sallate me gjera plot 
    [dish_id] => 2
    [dish_category_id] => 25
    [dish_qty] => 1
    [dish_price] => 8
)
Array
(
    [qty] => 1
    [id] => 1
    [name] => sallate cezar
    [price] => 12
    [category_id] => 25
    [dish_name] => sallate cezar
    [dish_id] => 1
    [dish_category_id] => 25
    [dish_qty] => 1
    [dish_price] => 12
)

And what I'm trying to do is to unset the item by dish_id. This is the way I intend to do that :

if(isset($_SESSION["cart_products"]) && count($_SESSION["cart_products"])>0)
        { 
            foreach ($_SESSION["cart_products"] as $key =>$cart_itm)
            {   
                if($cart_itm["dish_id"]==$removable_id)
                {
                    unset($cart_itm[$key]);
                }
            }
        }

Can anyone tell me what I'm doing worng..thanks :D

Answer 1

Actually you need to unset data from actual array which is $_SESSION["cart_products"] not $cart_itm.

So change unset($cart_itm[$key]); to unset($_SESSION["cart_products"][$key])

Answer 2

As alternative, you can use array_filter() with an anonimous function:

$removable_id = 1;

$_SESSION["cart_products"] = array_filter
( 
    $_SESSION["cart_products"], 
    function( $row ) use( $removable_id )
    {
        return $row['dish_id'] != $removable_id; 
    }
);

print_r( $_SESSION["cart_products"] );

will print:

Array
(
    [0] => Array
        (
            [qty] => 1
            [id] => 2
            [name] => sallate me gjera plot 
            [price] => 8
            [category_id] => 25
            [dish_name] => sallate me gjera plot 
            [dish_id] => 2
            [dish_category_id] => 25
            [dish_qty] => 1
            [dish_price] => 8
        )

)