3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(mb_detect_encoding('áéóú', null, true));
Output for 4.3.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(5) "UTF-8"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.3.2
Warning: Wrong parameter count for mb_detect_encoding() in /in/77v7F on line 3 NULL