3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php define('true', \false); var_dump( true, false, 1 === 1, 1 === 0 );
based on R160M
Output for 5.3.0 - 7.1.0
Notice: Constant true already defined in /in/E1IYD on line 2 bool(true) bool(false) bool(true) bool(false)
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/E1IYD on line 2 Notice: Constant true already defined in /in/E1IYD on line 2 bool(true) bool(false) bool(true) bool(false)
Output for 4.3.7 - 4.3.8, 5.0.0
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/E1IYD on line 2 Notice: Constant already defined in /in/E1IYD on line 2 bool(true) bool(false) bool(true) bool(false)