3v4l.org

run code in 300+ PHP versions simultaneously
<?php if ('null') echo 'Passes!'; else echo 'Fails :(';
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Passes!
preferences:
50.45 ms | 843 KiB | 4 Q