How to sort an array using usort() in PHP?

Question

PHP

Good evening.
There is an array:

[0] => Array
        (
            [code] => CAS
            [name] => Корпуса
            [code_parent] => 171
        )

    [1] => Array
        (
            [code] => MIN
            [name] => Майнинг
            [code_parent] => 171
        )

    [2] => Array
        (
            [code] => DVD
            [name] => Оптические приводы
            [code_parent] => 171
        )

    [3] => Array
        (
            [code] => VGP
            [name] => Видеокарты
            [code_parent] => 171
        )

    [4] => Array
        (
            [code] => BAC
            [name] => Фен-Щётки
            [code_parent] => 1434
        )

    [5] => Array
        (
            [code] => EPI
            [name] => Эпиляторы
            [code_parent] => 1434
        )

    [6] => Array
        (
            [code] => HCL
            [name] => Машинки для стрижки
            [code_parent] => 1434
        )

    [7] => Array
        (
            [code] => HDR
            [name] => Фены
            [code_parent] => 1434
        )

    [8] => Array
        (
            [code] => BSC
            [name] => Напольные весы
            [code_parent] => 1434
        )

    [9] => Array
        (
            [code] => SHR
            [name] => Бритвы
            [code_parent] => 1434
        )

    [10] => Array
        (
            [code] => 1434
            [name] => Красота и здоровье
        )

    [11] => Array
        (
            [code] => 171
            [name] => Комплектующие
        )

How to sort an array with the usort() function so that the following array is obtained:

[0] => Array
        (
            [code] => 1434
            [name] => Красота и здоровье
        )
    [1] => Array
        (
            [code] => BAC
            [name] => Фен-Щётки
            [code_parent] => 1434
        )

    [2] => Array
        (
            [code] => EPI
            [name] => Эпиляторы
            [code_parent] => 1434
        )

    [3] => Array
        (
            [code] => HCL
            [name] => Машинки для стрижки
            [code_parent] => 1434
        )

    [4] => Array
        (
            [code] => HDR
            [name] => Фены
            [code_parent] => 1434
        )

    [5] => Array
        (
            [code] => BSC
            [name] => Напольные весы
            [code_parent] => 1434
        )

    [6] => Array
        (
            [code] => SHR
            [name] => Бритвы
            [code_parent] => 1434
        )
    [7] => Array
        (
            [code] => 171
            [name] => Комплектующие
        )
    [8] => Array
        (
            [code] => CAS
            [name] => Корпуса
            [code_parent] => 171
        )

    [9] => Array
        (
            [code] => MIN
            [name] => Майнинг
            [code_parent] => 171
        )

    [10] => Array
        (
            [code] => DVD
            [name] => Оптические приводы
            [code_parent] => 171
        )

    [11] => Array
        (
            [code] => VGP
            [name] => Видеокарты
            [code_parent] => 171
        )

Sort by key [code_parent].

Answer 1

This issue can also be considered closed. He got the solution here .

Answer 2

You can’t sort it like that, you need to group it into hierarchical subarrays, if more than one level, then generally using recursion.
You do not have sorting, but it is not clear what happens randomly.