3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $string = "feedlog_54"; echo preg_match('feedlog_', $string);
based on 0PW7a
Output for 4.3.11 - 7.2.0
Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /in/Fas5P on line 4
Output for 4.3.0 - 4.3.10
Warning: Delimiter must not be alphanumeric or backslash in /in/Fas5P on line 4