3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(NAN == NAN); var_dump(NAN === NAN); var_dump(array(NAN) == array(NAN)); var_dump(array(NAN) === array(NAN)); $a = array(NAN); var_dump($a == $a); var_dump($a === $a);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.7
bool(false) bool(false) bool(false) bool(false) bool(true) bool(true)
preferences:
231.24 ms | 404 KiB | 292 Q