Posted by Erwin Moller on 05/31/06 09:39

Skeleton wrote:

> I am using Windows XP + PHP 5.1.2 at home for development and using
> Linux + PHP 4.4.2 at server side. In my code, I am doing some bitwise
> operations. While doing this, I have come accross to different results
> from my functions that uses bitwise xor (^) operator. When I digg into
> the code, I have tried to print out the binary of a decimal number. The
> result was so:
>
> echo decbin(-5817441119);
> // Prints 10100101010000001110010010100001 at local (PHP 5.1.2)
> // Prints 10000000000000000000000000000000 at server (PHP 4.4.2)
>
> Is this a bug? How can I workaround this problem? Thanks.

Hi,

Did you read the Fine Manual?
http://nl2.php.net/manual/en/function.decbin.php

says:
string decbin ( int number )
----------------
Returns a string containing a binary representation of the given number
argument. The largest number that can be converted is 4294967295 in decimal
resulting to a string of 32 1's.
----------------

Your number is bigger, or actually smaller. ;-)

Read the usercontributed notes for details and solutions.

Regards,
Erwin Moller

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