用 PHP 获取国家 IP 地址

理想情况下，我试图把一个 PHP 脚本，我可以查询从任何网络浏览器和它返回的国家的 IP 地址访问 PHP 脚本。

这可能吗? 还是有更好的解决方案？

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Look at the GeoIP functions under "Other Basic Extensions." http://php.net/manual/en/book.geoip.php

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There are free, easy APIs you can use, like those:

Which one looks the most trustworthy is up to you :)

Otherwise, there are scripts which are based on local databases on your server. The database data needs to be updated regularly, though. Check out this one:

HTH!

Edit: And of course, depending on your project you might want to look at HTML5 Location features. You can't use them yet on the Internet Explorer (IE9 will support it, long way to go yet), but in case your audience is mainly on mobile devices or using Safari/Firefox it's definitely worth to look at it!

Once you have the coordinates, you can reverse geocode them to a country code. Again there are APIs like this one:

Update, April 2013
Today I would recommend using Geocoder, a PHP library which makes it very easy to geocode ip addresses as well as postal address data.

***Update, September 2016
Since Google's privacy politics has changed, you can't use HTML5 Geolocation API if your server doesn't have HTPPS certificate or user doesn't allow you check his location. So now you can use user's IP and check in in PHP or get HTTPS certificate.

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You can download ip-tables from MaxMind:

http://www.maxmind.com/app/geolite

Import the CSV to your database (make sure to create an index for ip_long_from + ip_long_to). Then you can simply do:

$iplong = ip2long($_SERVER['REMOTE_ADDR']);


// should use mysqli with prepared statements etc, but just an example
mysql_query("
SELECT country
FROM ip_table
WHERE $iplong BETWEEN ip_long_from AND ip_long_to
LIMIT 1
");
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Use the widget www.feedsalive.com, to get the country informations & last page information as well.

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There are various web APIs that will do this for you. Here's an example using my service, http://ipinfo.io:

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

Web APIs are a nice quick and easy solution, but if you need to do a lot of lookups then having an IP -> country database on your own machine is a better solution. MaxMind offer a free database that you can use with various PHP libraries, including GeoIP.

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I found this blog post very helpful. It saved my day. http://www.techsirius.com/2014/05/simple-geo-tracking-system.html

Basically you need to install the IP database table and then do mysql query for the IP for location.

<?php
include 'config.php';
mysql_connect(DB_HOST, DB_USER, DB_PASSWORD) OR die(mysql_error());
mysql_select_db(DB_NAME) OR die(mysql_error());
$ip =  $_SERVER['REMOTE_ADDR'];
$long = sprintf('%u', ip2long($ip));
$sql = "SELECT * FROM `geo_ips` WHERE '$long' BETWEEN `ip_start` AND `ip_end`";
$result = mysql_query($sql) OR die(mysql_error());
$ip_detail = mysql_fetch_assoc($result);
if($ip_detail){
echo $ip_detail['country']."', '".$ip_detail['state']."', '".$ip_detail['city'];
}
else{
//Something wrong with IP
}
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Here's an example using http://www.geoplugin.net/json.gp 

$ip = $_SERVER['REMOTE_ADDR'];
$details = json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip={$ip}"));
echo $details;
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Here is another free API for geolocation requests: http://geoip.nekudo.com

Responses are in JSON format. Additionally the API sourcecode is available on github in case you need to setup your own API.

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If you need to have a good and updated database, for having more performance and not requesting external services from your website, here there is a good place to download updated and accurate databases.

I'm recommending this because in my experience it was working excellent even including city and country location for my IP which most of other databases/apis failed to include/report my location except this service which directed me to this database.
(My ip location was from "Rasht" City in "Iran" when I was testing and the ip was: 2.187.21.235 equal to 45815275)

Therefore I recommend to use these services if you're unsure about which service is more accurate:

Database: http://lite.ip2location.com/databases

API Service: http://ipinfodb.com/ip_location_api.php

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I see there are a lot of answers, but no one of them mentions https://freegeoip.net/

You're allowed up to 15,000 queries per hour. I think that's enough in most of the cases. Otherwise, you should think about using local databases from MaxMind GeoIP.

Freegeoip is open-source and you can find sources on github, deploy it locally and get rid of the query limits.

Also, service provides latitude/longitude/timezone and other useful stuff.

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$country_code = trim(file_get_contents("http://ipinfo.io/{$ip_address}/country"))

will get you the country code.

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You can get country from IP address with this location API

Code

    echo file_get_contents('https://ipapi.co/8.8.8.8/country/');

Response

   US

Here's a fiddle. Response is text when you query a specific field e.g. country here. No decoding needed, just plug it into your code.

P.S. If you want all the fields e.g. https://ipapi.co/8.8.8.8/json/, the response is JSON.

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Install and use PHP's GeoIP extension if you can. On debian lenny:

sudo wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
sudo gunzip GeoLiteCity.dat.gz
sudo mkdir -v /usr/share/GeoIP
sudo mv -v GeoLiteCity.dat /usr/share/GeoIP/GeoIPCity.dat


sudo apt-get install php5-geoip
# or sudo apt-get install php-geoip for PHP7

and then try it in PHP:

$ip = $_SERVER['REMOTE_ADDR'];
$country = geoip_country_name_by_name($ip);
echo 'The current user is located in: ' . $country;

returns:

The current user is located in: Cameroon
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You can try the services of https://www.geoip-db.com They provide a JSON or JSONP-callback solution.

<?php


$json = file_get_contents("https://www.geoip-db.com/json");
$data = json_decode($json);


print $data->country_code . "<br>";
print $data->country_name . "<br>";
print $data->state . "<br>";
print $data->city . "<br>";
print $data->postal . "<br>";
print $data->latitude . "<br>";
print $data->longitude . "<br>";
print $data->IPv4 . "<br>";


?>
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You can use https://ip-api.io/ to get country name, city name, latitude and longitude. It supports IPv6.

As a bonus it will tell if ip address is a tor node, public proxy or spammer.

Php Code:

$result = json_decode(file_get_contents('http://ip-api.io/json/64.30.228.118'));
var_dump($result);

Output:

{
"ip": "64.30.228.118",
"country_code": "US",
"country_name": "United States",
"region_code": "FL",
"region_name": "Florida",
"city": "Fort Lauderdale",
"zip_code": "33309",
"time_zone": "America/New_York",
"latitude": 26.1882,
"longitude": -80.1711,
"metro_code": 528,
"suspicious_factors": {
"is_proxy": false,
"is_tor_node": false,
"is_spam": false,
"is_suspicious": false
}
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I run the service at IPLocate.io, which you can hook into for free with one easy call:

<?php
$res = file_get_contents('https://www.iplocate.io/api/lookup/8.8.8.8');
$res = json_decode($res);


echo $res->country; // United States
echo $res->continent; // North America
echo $res->latitude; // 37.751
echo $res->longitude; // -97.822


var_dump($res);

The $res object will contain your geolocation fields like country, city, etc.

Check out the docs for more information.

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Ipdata.co provides a scalable API to do this. With 10 global endpoints each able to handle >800M requests daily!

It also gives you the organisation, currency, timezone, calling code, flag and Tor Exit Node status data from any IPv4 or IPv6 address.

In php

php > $ip = '8.8.8.8';
php > $details = json_decode(file_get_contents("https://api.ipdata.co/{$ip}"));
php > echo $details->region;
California
php > echo $details->city;
Mountain View
php > echo $details->country_name;
United States
php > echo $details->location;
37.405991,-122.078514

Disclaimer

I built this service.


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