3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/([a-z]+)(?:-|$)/', 'this-is-a-string', '\F1');
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
\F1