apache - htaccess redirect index.php to root (including subdomains)

Question

I'm trying to redirect index.php files to the root /, I've searched around and found several snippets of code similar to:

RewriteCond %{THE_REQUEST} ^.*/index.php 
RewriteRule ^(.*)index.php$ http://www.domain.com/$1 [R=301,L] 

This however won't work for subdomains, example below:

1. I have a subdomain: subdomain.domain.com
2. A user visits http://subdomain.domain.com/index.php
3. Using the htaccess above they are redirected to http://www.domain.com/ rather than http://subdomain.domain.com/

Does anyone know how to adjust the htaccess above so it will take into account the subdomain and redirect them to the appropriate location?

e.g. if a user visits http://subdomain.domain.com/index.php they will go to http://subdomain.domain.com/

Bonus Points:

Is there a htaccess that can just apply this rule to all folders?

So for any folder with an index.php they will just be redirected to it's root e.g. http://subdomain.domain.com/folder1/folder2/index.php would automatically go to http://subdomain.domain.com/folder1/folder2/

Answer 1

Do this:

RewriteCond %{THE_REQUEST} ^.*/index.php 
RewriteRule ^(.*)index.php$ /$1 [R=301,L]