3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php define('TRUE', false); if (TRUE) { echo "TRUE"; } else { echo "FALSE!!!"; }
Output for 5.1.3 - 7.1.7, 7.2.0
TRUE
Output for 7.1.10

Process exited with code 137.
Output for 4.3.0 - 5.1.2
FALSE!!!