3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo TRUE; echo true; define("true",0); define("TRUE",false); echo true; echo TRUE;
Output for 5.1.3 - 5.6.28, 7.0.0 - 7.1.0
11 Notice: Constant true already defined in /in/kgk3f on line 4 11
Output for hhvm-3.10.0 - 3.12.0
11 Notice: Constant true already defined in /in/kgk3f on line 4 Notice: Constant TRUE already defined in /in/kgk3f on line 5 11
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 5.1.2
11 Notice: Constant true already defined in /in/kgk3f on line 4 1
Output for 4.3.7 - 4.3.8, 5.0.0
11 Notice: Constant already defined in /in/kgk3f on line 4 1