note 97330 added to function.is-nan
| From: | phpatkeithtylerdotcom at osu1 dot php dot net | Date: | Wed, 14 Apr 2010 23:46:03 +0000 |
| Subject: | note 97330 added to function.is-nan | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-168245@lists.php.net to get a copy of this message | ||
It seems odd to me, but in boolean context, NAN evalutes to true.
<?php
var_dump(acos(8));
var_dump((bool)acos(8));
?>
Returns:
float(NAN)
bool(true)
Incidentally INF and -INF also evaluate to true.
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Manual Page -- http://www.php.net/manual/en/function.is-nan.php
Edit -- https://master.php.net/note/edit/97330
Del: integrated -- https://master.php.net/note/delete/97330/integrated
Del: useless -- https://master.php.net/note/delete/97330/useless
Del: bad code -- https://master.php.net/note/delete/97330/bad+code
Del: spam -- https://master.php.net/note/delete/97330/spam
Del: non-english -- https://master.php.net/note/delete/97330/non-english
Del: in docs -- https://master.php.net/note/delete/97330/in+docs
Del: other reasons-- https://master.php.net/note/delete/97330
Reject -- https://master.php.net/note/reject/97330
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