如何在不重置索引的情况下对数组进行排序？

$numbers = array(4, 2, 8, 6);
sort($numbers);

var numbers = [4, 2, 8, 6];
numbers.sort();

$numbers = array(4, 2, 8, 6);

function bubbleSort($array) {
    $length = count($array);
    for ($i = 0; $i < $length - 1; $i++) {
        for ($j = 0; $j < $length - $i - 1; $j++) {
            if ($array[$j] > $array[$j + 1]) {
                $temp = $array[$j];
                $array[$j] = $array[$j + 1];
                $array[$j + 1] = $temp;
            }
        }
    }
    return $array;
}

$sortedNumbers = bubbleSort($numbers);