How to Get City, State, and Country from an IP Address using PHP and Third-Party APIs?

How to Get Location Information from an IP Address in PHP

In order to tailor your web page to visitors' unique locations, you need a reliable way to retrieve information such as city, state, and country based on their IP addresses. There are a variety of options available for doing this.

One approach is to download a free GeoIP database and perform the lookup locally. Alternatively, you can use a third-party service for remote lookups, a convenient option that eliminates setup hassle but adds latency.

One such third-party service is ipinfo.io. It offers various information about an IP address, including hostname, geolocation, network owner, and more.

For example:

$ curl ipinfo.io/8.8.8.8
{
  "ip": "8.8.8.8",
  "hostname": "google-public-dns-a.google.com",
  "loc": "37.385999999999996,-122.0838",
  "org": "AS15169 Google Inc.",
  "city": "Mountain View",
  "region": "CA",
  "country": "US",
  "phone": 650
}

Here is an example of how to use ipinfo.io in PHP:

$ip = $_SERVER['REMOTE_ADDR'];
$details = json_decode(file_get_contents("http://ipinfo.io/{$ip}/json"));
echo $details->city; // -> "Mountain View"

You can also integrate ipinfo.io on the client side. Here's a jQuery example:

$.get("https://ipinfo.io/json", function (response) {
    $("#ip").html("IP: " + response.ip);
    $("#address").html("Location: " + response.city + ", " + response.region);
    $("#details").html(JSON.stringify(response, null, 4));
}, "jsonp");

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