php – 排序数组并保持键值

Array
(
    [team1] => Array
        (
            [points] => 10
            [players] => Array
                (
                     ...
                )
        )

    [team2] => Array
        (
            [points] => 23
            [players] => Array
                (
                     ...
                )
        )

    ... many more teams
)

我想按照每个队伍的分数排序队伍.我试过这个：

function sort_by_points($a,$b)
{
    if ($a['points']==$b['points']) return 0;
        return ($a['points']<$b['points'])?1:-1;
}

usort($this->wordswithdata,"sortbycount");

但是该方法会覆盖包含团队名称和返回的键：

Array
(
    [0] => Array
        (
            [points] => 23
            [players] => Array
                (
                     ...
                )
        )

    [1] => Array
        (
            [points] => 10
            [players] => Array
                (
                     ...
                )
        )

    etc...
)

有没有办法排序数组而不覆盖团队名称作为数组键？