3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (print chr(72)) if (print chr(101)) if (print chr(108)) if (print chr(111)) if (print chr(44)) if (print chr(32)) if (print chr(87)) if (print chr(111)) if (print chr(114)) if (print chr(108)) if (print chr(100)) if (print chr(33)) { }
Output for 4.3.0 - 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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Helo, World!
preferences:
232.11 ms | 406 KiB | 313 Q