在PHP中对多层多维数组进行排序

$multiArray = array(
    array('name' => 'John', 'age' => 25, 'score' => 80),
    array('name' => 'Jane', 'age' => 30, 'score' => 90),
    array('name' => 'Bob', 'age' => 20, 'score' => 70)
);

// 按照年龄升序排序
array_multisort(array_column($multiArray, 'age'), SORT_ASC, $multiArray);

// 输出排序结果
print_r($multiArray);

Array
(
    [0] => Array
        (
            [name] => Bob
            [age] => 20
            [score] => 70
        )

    [1] => Array
        (
            [name] => John
            [age] => 25
            [score] => 80
        )

    [2] => Array
        (
            [name] => Jane
            [age] => 30
            [score] => 90
        )

)

$multiArray = array(
    array('name' => 'John', 'age' => 25, 'score' => 80),
    array('name' => 'Jane', 'age' => 30, 'score' => 90),
    array('name' => 'Bob', 'age' => 20, 'score' => 70)
);

// 自定义排序函数
function customSort($a, $b) {
    if ($a['score'] == $b['score']) {
        return 0;
    }
    return ($a['score'] < $b['score']) ? -1 : 1;
}

// 使用自定义排序函数对数组进行排序
usort($multiArray, 'customSort');

// 输出排序结果
print_r($multiArray);

Array
(
    [0] => Array
        (
            [name] => Bob
            [age] => 20
            [score] => 70
        )

    [1] => Array
        (
            [name] => John
            [age] => 25
            [score] => 80
        )

    [2] => Array
        (
            [name] => Jane
            [age] => 30
            [score] => 90
        )

)