Determine repeat characters in a php string

Question

I have found many examples of how to find repeat characters in a string. I believe my requirement is unique.

I have string

$string=aabbbccffffd;
         


        

Answer 1

use count-chars()

http://php.net/manual/en/function.count-chars.php

and then asort()

http://php.net/manual/en/function.asort.php