A basic PHP wrapper for adding IP based user location detection into your application using the IP Info DB API.

You can use ->getCity($ip) to retrieve city level information about an IP address.

Example json response:

{
  "statusCode" : "OK",
  "statusMessage" : "",
  "ipAddress" : "81.149.15.65",
  "countryCode" : "GB",
  "countryName" : "UNITED KINGDOM",
  "regionName" : "ENGLAND",
  "cityName" : "SALISBURY",
  "zipCode" : "SP1 1TP",
  "latitude" : "51.0693",
  "longitude" : "-1.79569",
  "timeZone" : "+01:00"
}

You can use ->getCountry($ip) to retrieve country level information about an IP address. Obviously this is faster than retrieving city level information.

Example json response:

{
  "statusCode" : "OK",
  "statusMessage" : "",
  "ipAddress" : "81.149.15.65",
  "countryCode" : "GB",
  "countryName" : "UNITED KINGDOM"
}

You can use ->validIP($ip) to see if the specified IP Address is valid.

Under the hood this uses filter_var($ip, FILTER_VALIDATE_IP), I assume this is pretty solid. If you have any suggestions for a better way of doing this send a pull request or drop me an email.

You can use ->getIpAddress() to retrieve the users IP address.

You shouldn't be trusting a user based this data, HTTP headers can be faked, trivially.

You can get a (free) API key here, obviously this should be kept private.

While there are no strict query limits if you send more than 2 requests per second they will be queued. You will still always get a response, but it will be slowed to around 1 /second.

I would strongly suggest using some form of cache. Cookies (mmm cookies) are probably the easiest way to deal with this:

// Create a new instance
$ipInfo = new ipInfo (APIKEY, 'json');

// Grab the user location info
$location = json_decode($ipInfo->getCountry($userIP));

// Create a cookie holding the country code for 1 hour (3600 seconds)
setcookie('location', $location['countryCode'], time() + 3600);

• Allow devs not to pass an IP address (since it isn't required by the API)
• The ->getIpAddress() function probably needs additional testing

This is open-sourced software licensed under the MIT license.