note 71145 added to language.operators.bitwise
| From: | rizal dot almashoor at gmail dot com | Date: | Tue, 14 Nov 2006 00:12:50 +0000 |
| Subject: | note 71145 added to language.operators.bitwise | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-119696@lists.php.net to get a copy of this message | ||
The following function will perform a 32-bit left shift on a 64-bit machine:
<?php
function leftshift32($number, $steps)
{
$binary = decbin($number).str_repeat("0", $steps);
$binary = str_pad($binary, 32, "0", STR_PAD_LEFT);
$binary = substr($binary, strlen($binary) - 32);
return $binary{0} == "1" ? -(pow(2, 31) - bindec(substr($binary, 1))) : bindec($binary);
}
?>
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