3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define('true', false, true); var_dump(true, constant('true'));
Output for 4.3.0 - 5.6.21, 7.0.0 - 7.1.0
Notice: Constant true already defined in /in/fSh8r on line 3 bool(true) bool(true)
Output for hhvm-3.10.0 - 3.12.0
Warning: Case insensitive constant names are not supported in HipHop in /in/fSh8r on line 3 Notice: Constant true already defined in /in/fSh8r on line 3 bool(true) bool(true)