需要根據特定的鍵值對一組數組進行排序php

Question

在排序具有不同組且每個組具有相同值的數組時，我需要幫助。 我想按降序對組進行排序。 請在下面看看：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [name] => rose
                    [price] => 3
                )

            [1] => Array
                (
                    [name] => daisy
                    [price] => 3
                )

            [2] => Array
                (
                    [name] => orchid
                    [price] => 3
                )

        )
[1] => Array
    (
        [0] => Array
            (
                [name] => rose
                [price] => 1
            )

        [1] => Array
            (
                [name] => daisy
                [price] => 1
            )

        [2] => Array
            (
                [name] => orchid
                [price] => 1
            )

    )

[2] => Array
    (
        [0] => Array
            (
                [name] => rose
                [price] => 2
            )

        [1] => Array
            (
                [name] => daisy
                [price] => 2
            )

        [2] => Array
            (
                [name] => orchid
                [price] => 2
            )

    )

)

我希望它可以這樣排序：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [name] => rose
                    [price] => 3
                )

            [1] => Array
                (
                    [name] => daisy
                    [price] => 3
                )

            [2] => Array
                (
                    [name] => orchid
                    [price] => 3
                )

        )

[1] => Array
    (
        [0] => Array
            (
                [name] => rose
                [price] => 2
            )

        [1] => Array
            (
                [name] => daisy
                [price] => 2
            )

        [2] => Array
            (
                [name] => orchid
                [price] => 2
            )

    )

[2] => Array
    (
        [0] => Array
            (
                [name] => rose
                [price] => 1
            )

        [1] => Array
            (
                [name] => daisy
                [price] => 1
            )

        [2] => Array
            (
                [name] => orchid
                [price] => 1
            )

    )

)

注意我有很多的團體。 但這只是獲得想法的一部分。

從上面可以理解，我希望上面的數組根據價格鍵以降序排序。

提前致謝！

Answer 1

試試看。

uasort($array, function ($a, $b) {
    $price_a = array_values($a)[0]['price'];
    $price_b = array_values($b)[0]['price'];

    return $price_b - $price_a;
});

注意：如果組為空，則將出現錯誤。