Infinite loop on Geo Redirect - infinite-loop

Question

I have 3 websites for different regions having their own location specific content:
French website: http://dev.logichub.net/demo/fr/
German website: http://dev.logichub.net/demo/de/
Default website: http://dev.logichub.net/demo/
I would like to redirect the visitors to the respective website on the basis of their IP address. For example, if a user lands on http://dev.logichub.net/demo/fr/ from Germany, then he/she must be redirected to German website i.e. http://dev.logichub.net/demo/de/. I would like to implement this same behaviour on all the 3 websites.
I put the following code on the homepage on these 3 websites:
// get visitor IP address and process
$geo_data = unserialize( file_get_contents('http://www.geoplugin.net/php.gp?ip=' . $_SERVER['REMOTE_ADDR']) );
if ( ! empty( $geo_data ) ) {
switch ( $geo_data['geoplugin_countryCode'] ) {
// redirect French visitors to FR website
case "FR":
echo '<script>window.location.replace( "http://dev.logichub.net/demo/fr/" );</script>';
break;
// redirect German visitors to DE website
case "DE":
echo '<script>window.location.replace( "http://dev.logichub.net/demo/de/" );</script>';
break;
// redirect all others to international website
default:
echo '<script>window.location.replace( "http://dev.logichub.net/demo/" );</script>';
}
}
It works fine exactly like I want except the infinite loop on the redirected website. The visitor is redirected perfectly, but the new website load forever. How can I stop the infinite loop so once visitor redirected to the correct website, no more redirection occurs?

Answer 1

You have to check if the user is on the right domain before trying to redirect. Here's a solution fully made in PHP:
<?php
session_start();
$currentUrl = explode('/', "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]");
$currentCountry = isset($currentUrl[4]) ? $currentUrl[4] : '';
if(empty($_SESSION['country'])) {
$geo_data = unserialize( file_get_contents('http://www.geoplugin.net/php.gp?ip=' . $_SERVER['REMOTE_ADDR']) );
if(!empty($geo_data)) {
$country = $geo_data['geoplugin_countryCode'];
$_SESSION['country'] = $country = ($country != 'FR' || $country != 'DE') ? '' : $country;
}
}
if($currentCountry != $_SESSION['country'])
header('Location: http://dev.logichub.net/demo/'.$country);
You could improve this code by getting the current country without searching it in the URL (by defining it in the file, for example), but actually, it should work better.