HTACCESS change subdomain, add a custom file extension and url parameters

Question

I'm trying to redirect this url:

www.example.com/path/index.php?user=username&option=optname

to

username.example.com/path/optname.html

I tried several ways but I'm getting errors. How to do that?

Answer 1

Here's the sample rewrite commands you should be looking for:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^example.com [NC,OR]
RewriteCond %{HTTP_HOST} ^www.example.com [NC]
RewriteRule ^(.*)$ http://example.net/$1 [L,R=301,NC]