This is something I've asked previously, with a suggested solution of using mod_proxy, but unfortunately even with that I cannot get this working :(
I want to re-direct from a regular link to a https sub-domain so for example https://photofileltd.co.uk/index.php?page=services would then display https://secure.photofileltd.co.uk/new_site/index.php?page=services - but retain the URL!
Here's my .htaccess file, I've added the 'P' to load the proxy thing, but I just get a 500 internal server error:
Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /
RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://secure.photofileltd.co.uk/new_site/$1 [L, P]
Any help or advice would be much appreciated, thank you