Redirect TLD based on user's country

Question

I don't believe this is possible with .htaccess. I have multiple domains:

domain.mx
domain.com
domain.ca

I want to force a localized TLD based on user location. If a user is from Mexico and visits domain.com/test/a/, they will be directed to domain.mx/test/a on their first visit. From there, the site will automatically keep the user in .mx

This is my current PHP solution, but I'm not sure if rewriting the rules is possible or faster:

add_action( 'template_redirect', 'my_callback' );
function my_callback() {
 $userCountry = $_SERVER["HTTP_CF_IPCOUNTRY"];
 $baseurl = $_SERVER[HTTP_HOST];
 $url = $_SERVER[REQUEST_URI];
 
          // Mexico
     if (($userCountry == "MX") && (strpos($baseurl, 'mx') == false)) {
     $newurl = "https://domain.mx" . $url;
     wp_redirect( $newurl, 301 );
     exit();
 }

Answer 1

Based on: https:// serverfault.com/questions/357716/can-apache-conditionally-perform-a-rewrite-from-a-custom-http-header

RewriteCond %{HTTP:CF-IPCountry} = MX
RewriteRule .* https://domain.mx%{REQUEST_URI} [R=301,L,QSA]

Documentation: https://httpd.apache.org/docs /2.4/mod/mod_rewrite.html#rewritecond

But also consider that users may deliberatelytry to access websites that do not match their location, for example: Spanish-speaking users in Canada. I recommend allowing the user to set the locale they want, storing that preference in a cookie, and using %{HTTP_COOKIE} to control the override behavior.