Array
(
    [0] => Array
        (
            [id_product] => 1251
        )

    [1] => Array
        (
            [id_product] => 3839
        )

    [2] => Array
        (
            [id_product] => 1697
        )

    [3] => Array
        (
            [id_product] => 1021
        )

)
llArray
(
    [0] => Array
        (
            [id_product] => 1251
        )

    [1] => Array
        (
            [id_product] => 3839
        )

    [2] => Array
        (
            [id_product] => 1697
        )

    [3] => Array
        (
            [id_product] => 1021
        )

)