PHP按多个元素排序数组-基于日期和时间的排序

function compareElements($a, $b) {
    $dateA = strtotime($a['date']);
    $dateB = strtotime($b['date']);

    if ($dateA == $dateB) {
        $timeA = strtotime($a['time']);
        $timeB = strtotime($b['time']);
        return $timeA - $timeB;
    }

    return $dateA - $dateB;
}

$array = [
    ['date' => '2022-01-01', 'time' => '10:00'],
    ['date' => '2022-01-01', 'time' => '09:00'],
    ['date' => '2022-01-02', 'time' => '08:00'],
];

usort($array, 'compareElements');

print_r($array);

Array
(
    [0] => Array
        (
            [date] => 2022-01-01
            [time] => 09:00
        )

    [1] => Array
        (
            [date] => 2022-01-01
            [time] => 10:00
        )

    [2] => Array
        (
            [date] => 2022-01-02
            [time] => 08:00
        )

)