echo $ps->ip_lookup('209.85.229.99');
exit;

$ tail -n +1834 upload/includes/PS/PS.php | head -n 3
      foreach ($list as $ipstr) {
         $info[] = geoip_record_by_addr($gi,$ipstr);
      }

         $info[] = geoip_record_by_addr($gi,long2ip($ipstr));

long2ip — Converts an (IPv4) Internet network address into a string in Internet standard dotted format

function GeoIP_record_by_addr ($gi,$addr){
  if ($addr == NULL){
     return 0;
  }
  $ipnum = ip2long($addr);
  return _get_record($gi, $ipnum);
}

Beware when processing values that are invalid, you may get values that are different based on the OS.  For instance:

$ip = long2ip(pow(2,32)+1024);

On windows you get 255.255.255.255.  On linux it's 0.0.4.0.

So it seems it would be important to make sure the long you're converting is in the correct range.