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@ 2015-04-16T02:12:30Z

<?php

var_dump(sqrt(-1));
var_dump(NAN == true);
var_dump(NAN === true);

var_dump(NAN != NAN);

var_dump(NAN !== NAN);

var_dump(gettype(NAN));
var_dump(empty(NAN));
var_dump(is_null(NAN));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
sqrt: documentation ( source)

preferences:dark modelive preview

49.64 ms | 402 KiB | 5 Q