I have a setup where a static website sits in the root folder and Wordpress is located in a subfolder. So I need to rewrite all requests to index.html while all Wordpress-related requests should go to the subfolder. I'm achieving this using two .htaccess files: one in the root and another in Wordpress subfolder.

Root .htaccess:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/wp-.+
RewriteCond %{REQUEST_URI} !^/wordpress/
RewriteRule (wp-.*)$ /wordpress/$1 [L]
# Rewrite rule for frontend
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.html [L]
</IfModule>

Wordpress subfolder .htaccess:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /wordpress/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress/index.php [L]
</IfModule>

This works but when I try to openning /wp-admin/ I get redirected to /wp-login.php?redirect_to=https%3A%2F%2Fwww.example.com%2Fwordpress%2Fwp-admin%2F&reauth=1 so the subfolder is exposed in the URL.

Is there a way to hide the subfolder?

To hide the subfolder in the URL for WordPress-related requests, you can modify your setup slightly. You can keep the root .htaccess file as it is, but make some changes to the .htaccess file in the WordPress subfolder. Here's how you can do it:

1. Modify the .htaccess file in the WordPress subfolder (e.g., /wordpress/) as follows:

Add this line to prevent exposing the subfolder in the URL

RewriteCond %{REQUEST_URI} !^/wordpress/

RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /wordpress/index.php [L]

By adding the RewriteCond %{REQUEST_URI} !^/wordpress/ condition, you're ensuring that requests to the /wp-admin/ folder won't be affected by this rewrite rule, so the subfolder won't be exposed in the URL for WordPress-related requests.

2. In your root .htaccess file, you can simplify the rules for rewriting to index.html:

   RewriteEngine On

   Exclude requests to the /wordpress/ subfolder from this rule

   RewriteCond %{REQUEST_URI} !^/wordpress/

   Rewrite rule for frontend

   RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.html [L]

With these modifications, WordPress-related requests will still be handled by the WordPress subfolder, and the subfolder won't be exposed in the URL when accessing /wp-admin/. Other requests will be rewritten to index.html in the root folder as before.