> $abytes = explode('.', $ip); // explode the IP string
> $ip = 0;
> foreach ($abytes as $byte) $ip = ($ip << 8) + $byte;
>
> This will give you the valid numeric equivalent of the IP address.
Isn't that what ip2long() does?
Also, the man page on ip2long() has some good notes and code that may
help the OP.
http://www.php.net/manual/en/function.ip2long.php
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