PHP rsort函数返回错误的顺序

Question

I'm trying to sort my array values in descending order, but PHP sorted incorrectly. Here is my code example:

<?php $scores = array('98%','90%', '85%','100%','74%');
   rsort($scores);
   foreach($scores AS $key=>$val){
     echo $key.'=>'.$val.'<br/>';
   }
?>

And the result is:

0=>98%
1=>90%
2=>85%
3=>74%
4=>100%

But I want it to be like this:

0=>100%
1=>98%
2=>90%
3=>85%
4=>74%

I was also tried others sorting functions, but still cannot get the correct result.

Answer 1

Use:

rsort($scores,SORT_NUMERIC);

Instead of:

rsort($scores);