Posted by Oli Filth on 11/18/47 11:42

fritz-bayer@web.de said the following on 05/03/2006 21:06:
> Hi Dana,
>
> the complete code of the php, which I`m supposed to port to perl can be
> found at http://www.googlecommunity.com/scripts/google-pagerank.php
>
> It actually computes the pagerank of a website. Most of the script is
> calculating a checksum, which is needed to calculate the pagerank.
>
> It's really strange the code, but my job is just to port it, but it's
> not so easy as you can see?
>

Basically, PHP doesn't do unsigned arithmetic. This algorithm probably
originated in C or something similar, where you can specify unsigned
data types and everything will work fine. The implementation this guy
created relies on the current conversions occurring in PHP; on a 64-bit
platform this would probably fail.

However:

http://tumanov.com/entry/209
It's talking about VBScript, but the problem he describes is identical.

--
Oli

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