3v4l.org

run code in 300+ PHP versions simultaneously
<?php define(TRUE, false); define(FALSE, true); var_dump(true); var_dump(TRUE); var_dump(constant('TRUE')); var_dump(constant('true')); var_dump( true === TRUE ); echo constant("TEST");
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(true) bool(true) bool(true) bool(true) bool(true) Fatal error: Uncaught Error: Undefined constant "TEST" in /in/iLnRd:11 Stack trace: #0 /in/iLnRd(11): constant('TEST') #1 {main} thrown in /in/iLnRd on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
bool(true) bool(true) bool(true) bool(true) bool(true) Warning: constant(): Couldn't find constant TEST in /in/iLnRd on line 11
Output for 4.3.0 - 4.3.1
bool(true) bool(true) bool(true) bool(true) bool(true) Warning: constant() [http://www.php.net/function.constant]: Couldn't find constant TEST in /in/iLnRd on line 11
preferences:
319.9 ms | 401 KiB | 459 Q