按值排序关联数组并获得十个最大的键

Question

I have an associative array from a loop where I store a user_id (key) and a score (value)

$scores[$user_id] = $score;

I was wondering, after this loop has finished, how can I sort the values (get the ten highest scores) and get their keys.

Answer 1

asort($scores);
$tenHighest = array_slice($scores, -10, null, true);
$tenHighestKeys = array_keys($tenHighest);