Resolved: htaccess redirect to certain subdirectory if none given

In this post, we will see how to resolve htaccess redirect to certain subdirectory if none given

Question:

I am trying to redirect base URL to certain subdirectory, only if the base URL is requested. E.g. Redirect www.example.com to www.example.com/en. But if the URL already contains a subdirectory (eg. www.example.com/de), no redirection should take place.
How can this be done via .htaccess?

Best Answer:

Using mod_rewrite at the top of the root .htaccess file to redirect the root-directory-only to /en:
But note that if /en is a physical directory on the filesystem then you should be redirecting to /en/ (with a trailing slash), not /en. Otherwise, mod_dir will trigger a second redirect to append the trailing slash.

If you have better answer, please add a comment about this, thank you!

Source: Stackoverflow.com