3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php print_r(preg_match('3883', '/^[a-zA-Z0-9\-\._@\+]{1,100}$/'));
Output for 4.3.11 - 7.1.0
Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /in/2hGhk on line 3
Output for 4.3.0 - 4.3.10
Warning: Delimiter must not be alphanumeric or backslash in /in/2hGhk on line 3