Redirect All URI Requests, Including Folders, to index.php Using .htaccess?

Question

I am trying to configure my .htaccess file to redirect all URI requests, including folders, to index.php. Here is the structure of my root directory:

• app
• admin
• public
• index.php
• .htaccess

My goal is to redirect requests as follows:

www.example.com/anything -> Pass! Successfully redirected to index.php, no HTTP errors. www.example.com/admin -> Not Pass! Displays HTTP error: Forbidden (You don't have permission to access this resource.)

Any other request works fine, only when I try to access a URI that contains a folder with the same name I get http forbidden error

I want to handle all URI requests as normal GET requests to index.php. How can I achieve this?

Here is my current .htaccess configuration:

<IfModule mod_rewrite.c> 
    Options -MultiViews -Indexes +FollowSymLinks 

    # Turn rewriting on 
    RewriteEngine On
    RewriteBase /

    # Redirect http
    RewriteCond %{HTTPS} !=on
    RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]

    # Redirect requests to index.php 
    RewriteCond %{REQUEST_FILENAME} !-f 
    RewriteCond %{REQUEST_FILENAME} !-d 
    RewriteRule ^(.*)$ index.php/$1 [NC,L,QSA] 

    # proc/self/environ? no way!
    RewriteCond %{QUERY_STRING} proc/self/environ [OR]

    # Block out any script trying to set a mosConfig value through the URL
    RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR]

    # Block out any script trying to base64_encode crap to send via URL
    RewriteCond %{QUERY_STRING} base64_encode.*(.*) [OR]

    # Block out any script that includes a <script> tag in URL
    RewriteCond %{QUERY_STRING} (<|%3C).*script.*(>|%3E) [NC,OR]

    # Block out any script trying to set a PHP GLOBALS variable via URL
    RewriteCond %{QUERY_STRING} GLOBALS(=|[|\%[0-9A-Z]{0,2}) [OR]

    # Block out any script trying to modify a _REQUEST variable via URL
    RewriteCond %{QUERY_STRING} _REQUEST(=|[|\%[0-9A-Z]{0,2})

    # Send all blocked request to homepage with 403 Forbidden error!
    RewriteRule ^(.*)$ index.php [F,L]
</IfModule>

UPDATE:

Following the reply from @arkascha. I did remove the -Indexes from Options and remove the directory condition. Although I am getting the following error when I tried to access the URI www.example.com/admin:

example.com redirected you too many times. ERR_TOO_MANY_REDIRECTS

.htaccess configuration revised:

Options -MultiViews +FollowSymLinks 

# Redirect requests to index.php 
RewriteCond %{REQUEST_FILENAME} !-f  
RewriteRule ^(.*)$ index.php/$1 [NC,L,QSA] 

Answer 1

Your implementation is most likely itself responsible for the result you receive.

Let's take a closer look at your implementation:

# Redirect requests to index.php 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ index.php/$1 [NC,L,QSA] 

The second condition explicitly takes care to not apply that rule when the requested URL is mapped onto a folder in the server side file system. So any request that is mapped to a folder will not get rewritten to your index.phprouter file.

That means the http server tries to access the targeted resource in the file system, here the folder. That probably is where the 403 is raised. Probably because you explicitly prevented the generation of folder indexes:

Options -MultiViews -Indexes +FollowSymLinks 

That leaves the http server without an option.