Redirect domain according to country IP address using php or .htaccess

country-ip-redirect.txt

Suppose you have three sub domain like http://au.example.com, http://ng.example.com, http://in.example.com Australia, Nigeria, India.
And If some one type http://example.com then he/she redirected county specific url as per geo ip location. Here is the solution.

// By PHP
First of all download geoplugin library and call it on your page.
http://www.geoplugin.com/_media/webservices/geoplugin.class.phps

<?php
require_once('geoplugin.class.php');
$geoplugin = new geoPlugin();
$geoplugin->locate();
$countryCode = $geoplugin->countryCode;
switch($countryCode) {
    case AU:
       header('Location: http://au.example.com/');
        break;
    case NG:
       header('Location: http://ng.example.com/');
        break;
    case IN:
       header('Location: http://in.example.com/');
        break;
}
?>

// Here is the country code list for geoplugin and you can find easily.
http://www.geoplugin.com/iso3166

// By .htaccess
First you need to check that you have the mod_geoip module (GeoIP Extension) installed and configured on your server.
If yes then tweak your .htaccess file accordingly.

# start code
GeoIPEnable On
GeoIPDBFile /path/to/GeoIP.dat
# Start Redirecting countries

# Australia
RewriteEngine on
RewriteCond %{ENV:GEOIP_COUNTRY_CODE} ^AU$
RewriteRule ^(.*)$ http://au.example.com$1 [L]
 
# Nigeria
RewriteEngine on
RewriteCond %{ENV:GEOIP_COUNTRY_CODE} ^NG$
RewriteRule ^(.*)$ http://ng.example.com$1 [L]
 
# India
RewriteEngine on
RewriteCond %{ENV:GEOIP_COUNTRY_CODE} ^IN$
RewriteRule ^(.*)$ http://in.example.com$1 [L]

# and so on.