3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A {} var_dump(is_nan(NAN));
based on UD1io
Output for 4.3.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(true)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/tAaOC on line 4 Warning: is_nan() expects parameter 1 to be double, string given in /in/tAaOC on line 4 NULL