3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_replace('{^(\\\\.+)\\\\[^\\\\]+$|^(.+)\\\\[^\\\\]+$}', '$1', 'Grapa\\Cli\\Db'));
based on gNH4s
Output for 4.3.0 - 7.2.0
string(0) ""