3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $text = 'СТРОКа'; echo mb_strtoupper($text) === $text ? 'yes' : 'no';
Output for 5.6.7 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
no
Output for 4.3.0 - 5.5.35
yes