Match An IP Address To A Physical Location With PHP

Cody Taylor — Thu, 11 Jun 2009 01:14:07 +0000

Sometimes it’s useful to locate where a certain IP address is located. Usually this isn’t really that accurate but at least it gives you a general idea for stats or marketing research. I’ve written a simple php function that uses curl to query a IP address location database for the location info. In the function I specify that I want a JSON data structure containing the location information. I chose JSON over the XML alternative just for ease of use. The object that we get returned needs to be referenced in a specific kind of way. I show how under the function.
This function uses the IPInfoDB JSON php API. There are quite a few alternatives out there so feel free to do your research. The IPInfoDB PHP API returns :

Country Code (CA or US)
Country Name (Canada)
Region Code
Region Name (Province or Dtate)
City
Postalcode or Zip Code (which doesn’t always work)
Latitude
Longitude
gmt offset
Dst offset


function get_location_info($ip_address)
{
  $url = 'http://ipinfodb.com/ip_query.php?ip=';
  $url .= $ip_address;
        $url .= '&output=json';
  $ch = curl_init();
  
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    
  $json_packet = curl_exec($ch);
  $location_array = json_decode($json_packet);
  curl_close($ch);
  return($location_array);

}//get_location_info

$loc_arr = get_location_info("69.157.107.64");
echo "\n";
echo $loc_arr->{'City'};
echo "\n";
echo $loc_arr->{'RegionName'};
echo "\n";
echo $loc_arr->{'CountryCode'};

Hopefully theres no confusion there.

tech stuff » gps

Match An IP Address To A Physical Location With PHP