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run code in 150+ php & hhvm versions
Bugs & Features
<?php echo "\nLets try to redefine true..\n"; define("true", false); if (true) { echo "TRUE"; } else { echo "FALSE"; } echo "\nNow redefine TRUE..\n"; define("TRUE", false); if (TRUE) { echo "TRUE"; } else { echo "FALSE"; }
Output for 5.1.3 - 5.6.28, 7.0.0 - 7.1.0
Lets try to redefine true.. Notice: Constant true already defined in /in/Fqtv1 on line 3 TRUE Now redefine TRUE.. TRUE
Output for hhvm-3.12.0
Lets try to redefine true.. Notice: Constant true already defined in /in/Fqtv1 on line 3 TRUE Now redefine TRUE.. Notice: Constant TRUE already defined in /in/Fqtv1 on line 12 TRUE
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.3.6, 4.3.9 - 4.4.9, 5.0.1 - 5.1.2
Lets try to redefine true.. Notice: Constant true already defined in /in/Fqtv1 on line 3 TRUE Now redefine TRUE.. FALSE
Output for 4.3.7 - 4.3.8, 5.0.0
Lets try to redefine true.. Notice: Constant already defined in /in/Fqtv1 on line 3 TRUE Now redefine TRUE.. FALSE