note 84511 deleted from function.abs by danbrown
| From: | danbrown@php.net | Date: | Thu, 17 Jul 2008 14:14:22 +0000 |
| Subject: | note 84511 deleted from function.abs by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-141624@lists.php.net to get a copy of this message | ||
Note Submitter: Ister
----
jeremys indicated one thing - there is no sgn function wich actually seems a bit strange for me. Of
course it is as simple as possible, but it is usefull and it is a standard math function needed
occasionally.
Well, I have solved this function in a bit different matter:
<?php
function sgn($x)
{
if($x>0)
$x=1;
else if($x<0)
$x=-1;
else if($x!=0)
$x=null;
return $x;
}
?>
The difference is that it returns null when the argument isn't a number at all.
Any better ideas?