3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(mb_internal_encoding()); print mb_strtolower("Ö");
based on plCqA
Output for 5.6.8 - 7.2.0
string(5) "UTF-8" ö
Output for 4.3.3 - 5.5.35
string(10) "ISO-8859-1" �
Output for 4.3.0 - 4.3.2
string(4) "pass" �