3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('[\.+]', 'a[test],b', $allowableTags);
based on qAl90
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: allowableTags in /in/ZeNPB on line 3
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: allowableTags in /in/ZeNPB on line 3