3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $match = preg_replace(array('/\d/', '/a/'), '_', 'ada2d1', 1); print_r($match);
Output for 4.3.0 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
_da_d1
Output for hhvm-3.10.0

Process exited with code 153.