PHP: Quova / Neustar API IP Intel

quova.php

<?php
/**
 * Quova : http://developer.quova.com/
 * *
 * Key Rate Limits
 * 2 Calls per second
 * 1,000 Calls per day
 */
// initiate curl and set options
$ipin = '174.79.250.40'; // $_SERVER['REMOTE_ADDR'];
$ch = curl_init();
$ver = 'v1/';
$method = 'ipinfo/';
$apikey = 'xxx';
$secret = 'xxx';
$timestamp = gmdate('U'); // 1200603038
// echo $timestamp;
$sig = md5($apikey . $secret . $timestamp);
$service = 'http://api.quova.com/';
curl_setopt($ch, CURLOPT_URL, $service . $ver. $method. $ipin . '?apikey=' .
             $apikey . '&sig='.$sig . '&format=json');
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($ch);
$headers = curl_getinfo($ch);

// close curl
curl_close($ch);

// return XML data
if ($headers['http_code'] != '200') {
   echo "An error has occurred accessing this IP";
  return false;
} else {
   echo '<pre>'.$data;
   return($data);
}

?>