数组排序并保持按键的值

我有一个数组，看起来像这样：

I have an array that looks like this:

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

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

    ... many more teams
)

和我想点每支球队都有数以球队进行排序。我曾尝试这样的：

and I would like to sort the teams by the number of points each team has. I have tried this:

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

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

但这种方法会覆盖包含teamnames和返回键：

But that approach overrides the keys containing the teamnames and returns:

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

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

    etc...
)

有什么办法没有覆盖teamnames作为数组键的数组进行排序？

Is there any way to sort the array without overwriting the teamnames as the array keys?