3v4l.org

run code in 500+ PHP versions simultaneously
<?php printf('%u', -1); print PHP_EOL; print PHP_INT_MAX;
Output for 8.2.31 - 8.2.32, 8.3.5 - 8.3.33, 8.4.9 - 8.4.24, 8.5.6 - 8.5.9
18446744073709551615 9223372036854775807
preferences:
48.74 ms | 542 KiB | 4 Q