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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(NAN == NAN); var_dump(NAN !== NAN);
Output for 4.3.6 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(true)
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 2 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 2 bool(true) Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 3 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/ehVF6 on line 3 bool(false)