Check if a String is ALL CAPS in PHP

Question

What's the best way to see if a string contains all capital letters? I still want the function to return true if the string also contains symbols or numbers.

question from:https://stackoverflow.com/questions/4211875/check-if-a-string-is-all-caps-in-php

Answer 1

Check whether strtoupper($str) == $str

To handle non-ascii use:

mb_strtoupper($str, 'utf-8') == $str