How to redirect domain according to country IP address in PHP?

You can redirect users to different domains based on their country IP address using the GeoIP extension or third-party services like geoPlugin. This technique is useful for creating localized websites or region-specific content.

Using geoPlugin Class

First, download the geoPlugin class from the official website ?

Installation: Download geoPlugin class from https://www.geoplugin.com/_media/webservices/geoplugin.class.phps and save it as geoplugin.class.php in your project directory.

Here's a complete example that detects the user's country and redirects accordingly ?

<?php
require_once('geoplugin.class.php');

// Create geoPlugin instance
$geoplugin = new geoPlugin();
$geoplugin->locate();

// Get country code from user's IP
$country_code = $geoplugin->countryCode;

// Redirect based on country code
switch ($country_code) {
    case "AL": // Albania
        header('Location: http://sq.wikipedia.org/');
        break;
    case "NL": // Netherlands
        header('Location: http://nl.wikipedia.org/');
        break;
    case "FR": // France
        header('Location: http://fr.wikipedia.org/');
        break;
    case "DE": // Germany
        header('Location: http://de.wikipedia.org/');
        break;
    default: // All other countries
        header('Location: http://en.wikipedia.org/');
        break;
}
exit(); // Stop script execution after redirect
?>

Alternative Method with Array Mapping

For better maintainability, you can use an array to map country codes to domains ?

<?php
require_once('geoplugin.class.php');

$geoplugin = new geoPlugin();
$geoplugin->locate();
$country_code = $geoplugin->countryCode;

// Define country-to-domain mapping
$country_domains = [
    'AL' => 'http://sq.wikipedia.org/',
    'NL' => 'http://nl.wikipedia.org/',
    'FR' => 'http://fr.wikipedia.org/',
    'DE' => 'http://de.wikipedia.org/',
    'ES' => 'http://es.wikipedia.org/',
];

// Get redirect URL or default
$redirect_url = $country_domains[$country_code] ?? 'http://en.wikipedia.org/';

// Perform redirect
header('Location: ' . $redirect_url);
exit();
?>

How It Works

The geoPlugin class analyzes the visitor's IP address and determines their geographical location. The locate() method fetches location data, and countryCode property returns the ISO 3166 two-letter country code. The header() function then redirects the user to the appropriate domain.

Note: You can find the complete list of ISO 3166 country codes at https://www.geoplugin.com/iso3166

Key Points

• Always call exit() after header() redirect to prevent further script execution
• GeoIP detection may not be 100% accurate, especially for VPN users
• Consider caching geolocation results to improve performance
• Test with different IP addresses to ensure proper functionality

Conclusion

Country-based redirection using geoPlugin provides an effective way to serve localized content. The array mapping approach offers better code maintainability when handling multiple countries and domains.