3v4l.org

run code in 200+ PHP versions simultaneously
<?php $char = "ჯ"; $uppercaseChar = mb_strtoupper($char); echo $uppercaseChar . "\n"; echo $uppercaseChar === $char ? 'same' : 'different';
based on Le5A1
Output for 7.3.0 - 7.4.0
Ჯ different
Output for 7.1.25 - 7.2.15
ჯ same