Justtechjobs.com Find a programming school near you






Online Campus Both


php-general | 2001092

RE: [PHP] Weird results from Left Shift From: Eric O'Connell (eoconnell <email protected>)
Date: 09/19/01

> Okay, from the manual I have
> $a << $b - Shift the bits of $a $b steps to the left
>
> When I run the code
>
> <?php
> $num = "0001000";
> echo "Number is $num<BR>";
> $num = $num << 1;
> echo "Shifted Number is $num";
> ?>
>
> I get the output
>
> Number is 0001000
> Shifted Number is 2000
>
> What am I missing?!?

$num = "0001000"; sets $num to be 1000, not 0001000 binary.

As I'm not sure if PHP has a binary type, you can use hex:

<?php

$num = 0x8; // 0001000 binary
echo "Number is $num<BR>";
$num = $num << 1;
echo "Shifted Number is $num";

?>

Eric O'Connell 

-- 
PHP General Mailing List (http://www.php.net/)
To unsubscribe, e-mail: php-general-unsubscribe <email protected>
For additional commands, e-mail: php-general-help <email protected>
To contact the list administrators, e-mail: php-list-admin <email protected>