3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(true); var_dump(TRUE); define('TRUE', 23); var_dump(true); var_dump(TRUE); define('true', 23); var_dump(true); var_dump(TRUE);
Output for 5.1.3 - 5.6.28, 7.0.0 - 7.1.0
bool(true) bool(true) bool(true) bool(true) Notice: Constant true already defined in /in/70aNs on line 7 bool(true) bool(true)
Output for hhvm-3.10.0 - 3.12.0
bool(true) bool(true) Notice: Constant TRUE already defined in /in/70aNs on line 4 bool(true) bool(true) Notice: Constant true already defined in /in/70aNs on line 7 bool(true) bool(true)
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 5.1.2
bool(true) bool(true) bool(true) int(23) Notice: Constant true already defined in /in/70aNs on line 7 bool(true) int(23)
Output for 4.3.7 - 4.3.8, 5.0.0
bool(true) bool(true) bool(true) int(23) Notice: Constant already defined in /in/70aNs on line 7 bool(true) int(23)