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<?php var_dump(NAN); //var_dump((int)INF); //var_dump(INF == 0) ?>
Output for 4.3.6 - 7.2.0
float(NAN)
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/M58gv on line 2 string(3) "NAN"