3v4l.org

run code in 500+ PHP versions simultaneously
<?php var_dump(NAN === NAN); // false var_dump(is_nan(NAN)); // true ?>
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
bool(false) bool(true)
preferences:
50.37 ms | 850 KiB | 4 Q