When storing ips as unsigned doubles I noticed a strange behaviour when passing unsigned doubles through the long2ip routine.

-- sample --

<?php

$ip = ip2long("192.168.0.1");

print long2ip($ip)."\n";

if ($ip < 0) $ip+=pow(2,32);  //convert from signed to unsigned

print long2ip($ip)."\n";

?>

-- end ---

In the first line - as supposed - the script returns "192.168.0.1", but after conversion I get an offset by one and it returns "192.168.0.0". I read in the doc that long2ip is capable of handling both signed and unsigned long integers.

Peter