[REQ] Geo Targeting Script

<?php 
// Get country code corresponding to an IP address 

function get_country_code ($ip) {
$c = curl_init();
curl_setopt($c, CURLOPT_URL, "http://www.topwebhosts.org/whois/index.php?query=$ip");//otwieramy Å‚acze ze strona
curl_setopt($c, CURLOPT_HEADER, 1);
curl_setopt($c, CURLOPT_VERBOSE, 1);
curl_setopt($c, CURLOPT_RETURNTRANSFER,1);
curl_setopt($c, CURLOPT_USERAGENT, 'Mozilla/5.0 (X11; U; Linux i686;pl; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3');
curl_setopt($c, CURLOPT_ENCODING, 'gzip');
curl_setopt($c, CURLOPT_ENCODING, 'deflate');
curl_setopt($c, CURLOPT_ENCODING, '');
curl_setopt($c, CURLOPT_FOLLOWLOCATION, 1);
$page = curl_exec($c);
$code = explode('country',$page);
$code = explode(':',$code[1]);
$code = explode('admin-c:',$code[1]);
$country_code=trim($code[0],"admin-c:");
return $country_code;
}
// Detect user's IP address
$user_ip = $_SERVER["REMOTE_ADDR"];

// COUNTRY CODE, eg. us, fr, vn
$country_code = get_country_code($user_ip);

switch($country_code)
	{
		case 'US':
			//redirect to US page			
			break;
		case 'FR':
			//redirect to FR page			
			break;
		case 'PL':
			//redirect to pl page			
			break;
//etc...etc...etc
		default:
			//default redirect
	}


?>

<?php
  /**
   * Original code from svn://hostip.info/hostip/api/trunk. Optimized & enhanced by Quang Pham @ Saoma, 06.01.07.
   */   
  function isPrivateIP($ip) {
    list($a, $b, $c, $d) = sscanf($ip, "%d.%d.%d.%d");
    return  $a === null || $b === null || $c === null || $d === null ||
            $a == 10    ||
            $a == 239   ||
            $a == 0     ||
            $a == 127   ||
           ($a == 172 && $b >= 16 && $b <= 31) ||
           ($a == 192 && $b == 168);
  }   
   
  function getIP() {
    $default = false;
   
    if (isset($_SERVER)) {
      $default_ip = $_SERVER["REMOTE_ADDR"];     
      $xforwarded_ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
      $client_ip = $_SERVER["HTTP_CLIENT_IP"];   
    } else {
      $default_ip = getenv('REMOTE_ADDR');
      $xforwarded_ip = getenv('HTTP_X_FORWARDED_FOR');
      $client_ip = getenv('HTTP_CLIENT_IP');
    }
   
    if ($xforwarded_ip != "") {
      $result = $xforwarded_ip;
    } else if ($client_ip != "") {
      $result = $client_ip;
    } else {
      $default = true;
    }
   
    if (!$default) { // additional check for private ip numbers
      $default = isPrivateIP($result);
    }
   
    if ($default) {
      $result = $default_ip;
    }
   
    return $result;
  }
 
  function showUSContent() {
    // show US content here, for ex. Yahoo! ads 
  }
 
  function showInternationalContent() {
    // show international content here, for ex. Google ads
  }
 
  function showGeoTargetContent() {
    // make a valid request to the hostip.info API 
    $url = "http://api.hostip.info/country.php?ip=".getIP();
 
    // fetch with curl
    $ch = curl_init();
 
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $country = curl_exec($ch);
 
    curl_close ($ch);
 
    // display according geotarget
    if ($country == "US") {
      showUSContent();
    } else {   
      showInternationalContent();
    }
  } 

  showGeoTargetContent();
?>