3v4l.org

run code in 300+ PHP versions simultaneously
<?php if ("null" == null) { echo "true"; } else { echo "false"; }
Output for 4.3.0, 5.4.45, 8.1.32, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
false
preferences:
54.28 ms | 406 KiB | 5 Q