3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $val = preg_replace('/16/\-16/16\-/','','16-17-18-19-20'); echo $val;
based on P9dJZ
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Unknown modifier '\' in /in/q1inU on line 2
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier '\': [/16/\-16/16\-/] in /in/q1inU on line 2
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '\' in /in/q1inU on line 2