3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define('TRUE', false); define('true', false); define('FALSE', true); define('false', true); var_dump(TRUE, true, FALSE, false);
Output for 5.1.3 - 7.1.0
Notice: Constant true already defined in /in/B4pTI on line 3 Notice: Constant false already defined in /in/B4pTI on line 5 bool(true) bool(true) bool(false) bool(false)
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 5.1.2
Notice: Constant true already defined in /in/B4pTI on line 3 Notice: Constant false already defined in /in/B4pTI on line 5 bool(false) bool(true) bool(true) bool(false)
Output for 4.3.7 - 4.3.8, 5.0.0
Notice: Constant already defined in /in/B4pTI on line 3 Notice: Constant already defined in /in/B4pTI on line 5 bool(false) bool(true) bool(true) bool(false)