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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(NAN === NAN); var_dump(NAN == NAN); var_dump(NAN < NAN); var_dump(NAN <= NAN); var_dump(NAN > NAN); var_dump(NAN >= NAN);
Output for 4.3.6 - 5.3.29, 7.0.0 - 7.1.0
bool(false) bool(false) bool(true) bool(true) bool(true) bool(true)
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.13.2
bool(false) bool(false) bool(false) bool(false) bool(false) bool(false)
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 3 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 3 bool(true) Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 4 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 4 bool(true) Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 5 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 5 bool(false) Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 6 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 6 bool(true) Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 7 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 7 bool(false) Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 8 Notice: Use of undefined constant NAN - assumed 'NAN' in /in/p9qp7 on line 8 bool(true)