3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php if(preg_match('/[^a-z_\-0-9]/i', 'dani__')) { echo "not valid string"; } else { echo "valid string"; }
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
valid string
Output for hhvm-3.10.0

Process exited with code 153.