.htaccess redirect FROM subfolder to domain name

Question

I had website content in a subfolder (http://mydomain.com/subfolder/index.php), now I copied everything over to the root folder (http://mydomain.com/index.php).

I would like to redirect all the visitors that have bookmarked the old page to the new content (at least to the new index.php) using .htaccess.

Is this correct:

RewriteEngine on
RewriteRule /subfolder/^(.*)$ http://mydomain.com [R=301,L]

?

And where would I place the .htaccess file, in the subfolder or the root folder?

Answer 1

Placing the following .htaccess in / (where your index.php is located) should do the trick:

RewriteEngine on
RewriteRule ^subfolder/(.*)$ /$1 [R=301,L]

Or you could place the following .htaccess in /subfolder:

RewriteEngine On
RewriteRule ^(.*)$ /$1 [R=301,L]

Note that the () around .* and the $1 redirects /subfolder/someFile.php to /someFile.php. If you skip it, everything in /subfolder redirects to /.