3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define('TRUE', false,true); if (true) { echo "TRUE"; } else { echo "FALSE!!!"; }
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Constant true already defined in /in/0mRnV on line 2 TRUE
Output for hhvm-3.10.0 - 3.12.0
Warning: Case insensitive constant names are not supported in HipHop in /in/0mRnV on line 2 Notice: Constant TRUE already defined in /in/0mRnV on line 2 TRUE