3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define('FOO', 3); define('FOO', 4);
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 7.1.0
Notice: Constant FOO already defined in /in/dNeVK on line 4
Output for 4.3.7 - 4.3.8, 5.0.0
Notice: Constant already defined in /in/dNeVK on line 4