3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $m = "Test"; echo preg_replace('e', '_', $m);
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Delimiter must not be alphanumeric or backslash in /in/U6kq3 on line 4
Output for 4.3.0 - 4.3.10, hhvm-3.12.0
Warning: Delimiter must not be alphanumeric or backslash in /in/U6kq3 on line 4
Output for hhvm-3.10.0

Process exited with code 153.