Question

How can I let my server load (invisibly!) somepage.htm, when an url is given with a subdomain in front of it, using only Apache’s .htaccess ?

So that when user types subdomain.website.org then server loads website.org/somepage.htm

Answer 1

As long as both subdomain.website.org and website.org point to the same server with the same document root, you can put these rules in the htaccess file in the document root:

RewriteEngine On
RewriteCond %{HTTP_HOST} !^(www\.)?website.org$ [NC]
RewriteCond %{HTTP_HOST} ^([^.]+)\.website.org$ [NC]
RewriteRule ^$ /%1.htm [L]