Finding geo location of the ip address in PHP

      If you are using  google map  in your  application and  wanted to  show the user location google map in your application.  then we  the find the  ip  address  and  get the  geo location of the  ip  address. Bellow  is the  method   to  find the  city  by  passing  the  ip  address Using  PHP.


/**
 * Funtion  to  find the  city by passing the  IP Address.
 */
function geoCheckIP($ip)
{

//check, if the provided ip is valid

    if (!filter_var($ip, FILTER_VALIDATE_IP))
    {

        throw new InvalidArgumentException("IP is not valid");
    }

//contact ip-server

    $response = @file_get_contents('http://www.netip.de/search?query=' . $ip);

    if (empty($response))
    {

        throw new InvalidArgumentException("Error contacting Geo-IP-Server");
    }

//Array containing all regex-patterns necessary to extract ip-geoinfo from page

    $patterns = array();

    $patterns["town"] = '#City: (.*?)<br#i';

//Array where results will be stored

    $ipInfo = array();



//check response from ipserver for above patterns

    foreach ($patterns as $key => $pattern)
    {

//store the result in array

        $ipInfo[$key] = preg_match($pattern, $response, $value) && !empty($value[1]) ? $value[1] : 'not found';
    }
    /* I've included the substr function for Country to exclude the abbreviation (UK, US, etc..)
      To use the country abbreviation, simply modify the substr statement to:
      substr($ipInfo["country"], 0, 3)
     */
    $ipdata = $ipInfo["town"];

    return $ipdata;
}

geoCheckIP('50.56.112.226');


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