3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $name = "ΓΌ"; $name = preg_replace('/[^A-Za-z0-9]/ui', '_', $name ); var_dump($name);
based on cOhcB
Output for 4.3.0 - 7.2.0
string(1) "_"