How to check if letter is upper or lower in PHP?

Question

I have texts in UTF-8 with diacritic characters also, and would like to check if first letter of this text is upper case or lower case. How to do this?

Answer 1

function starts_with_upper($str) {     $chr = mb_substr ($str, 0, 1, "UTF-8");     return mb_strtolower($chr, "UTF-8") != $chr; } 

Note that mb_substr is necessary to correctly isolate the first character.

Working Demo Online

Answer 2

Use ctype_upper for check upper case:

$a = array("Word", "word", "wOrd");  foreach($a as $w) {     if(ctype_upper($w{0}))     {         print $w;     } }