note 41131 deleted from language.operators.bitwise by danielc
| From: | danielc@php.net | Date: | Mon, 13 Apr 2009 16:16:02 +0000 |
| Subject: | note 41131 deleted from language.operators.bitwise by danielc | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-153182@lists.php.net to get a copy of this message | ||
Note Submitter: xert
Reason: 1
----
To determine number of bits set to 1 use:
<?php
function bits($val)
{
$v = (int)$val;
$c = 0;
for ($c=0; $v; $c++)
{
$v &= $v - 1;
}
return $c;
}
?>
Code from: http://graphics.stanford.edu/~seander/bithacks.html