3v4l.org

run code in 200+ php & hhvm versions
<?php var_dump(NAN < 1.0);
based on Jag0H
Output for 5.4.0 - 5.6.28, 7.1.10 - 7.2.6
bool(false)
Output for 4.3.6 - 5.3.29, 7.0.0 - 7.1.7
bool(true)
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/GkqZZ on line 3 bool(true)