PHP sites as subfolders in a Drupal installation

I have a drupal site that was on shared hosting with other non-drupal sites. Of course there's a primary domain and subfolders.

I recently moved the drupal site to be the primary domain, so all the other non-drupal sites are as subfolders.

Since I've done this however, none of the other non-drupal sites is displaying.

But when I disable the .htaccess file, the non-drupal sites display, but the drupal site on the primary domain begins to have issues.

Does anyone know the fix for this .htaccess file to allow non-drupal sites to be subfolders of a drupal开发者_运维知识库 site?

The Drupal Handbook has an entry about configuring .htaccess to ignore certain subfolders. Namely, given two subfolders /folder1/ and /folder2/, you'd add the following immediately after RewriteEngine On:

RewriteCond %{REQUEST_URI} "/folder1/" [OR]
RewriteCond %{REQUEST_URI} "/folder2/"
RewriteRule (.*) $1 [L]