3v4l.org

run code in 300+ PHP versions simultaneously
<?php define("TRUE", false); if (TRUE) { echo "TRUE"; } else { echo "OMG SO l33t"; }
Output for 8.0.0 - 8.0.12, 8.1rc1 - rc3
Warning: Constant TRUE already defined in /in/LDbqU on line 3 TRUE
Output for 5.1.3 - 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 - 7.3.31, 7.4.0 - 7.4.25
TRUE
Output for 4.3.1 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.2
OMG SO l33t

preferences:
73.92 ms | 462 KiB | 5 Q