3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [NAN]; var_dump(in_array(NAN, $a)); var_dump(empty($a)); var_dump(in_array($a[0], $a));
based on VWIHk
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
bool(false) bool(false) bool(false)