htaccess question

I know it's not a php question, but I can't readily find the answer elsewhere. I want to make this directive universal. Put htaccess file on any host in any folder. This works RewriteEngine On RewriteCond %{SERVER_PORT} !=443 RewriteRule ^(.*)$ https://www.foo.org/bar/$1 [R=301,L] #Here the foo.org and /bar must be specified I want what is in effect RewriteRule ^(.*)$ https://{host_name}/{directory}/$1 [R=301,L] I can easily do this with php regex capturing the (host and dir) and then rewriting the text string; but the Apache directives are not obvious.