Block access to folder outside of PHP in htaccess - .htaccess

Question

I have the following structure on my project
assets
css
js
img
........
caches
x-cache
y-cache
........
resources
config.php
libraries
pages
........
index.php
.htaccess
Basically, I use assets and resources/pages to display pages. And I don't want other files such as config.php as accessible from a user. So, I'm asking how can I make these files/folders available only by PHP code? How can I redirect users to the index page?

Answer 1

Create a php file in each of the folders and call it index.php
put d following code inside the index.php file
<?php
header('Location:../');
?>
if any user try to visit www.sitename.com/assets they will be redirected to the super folder index.php file. Same as the /resources folder.
For folders inside folders use
<?php
header('Location:../../');
?>
Now, for files like config.php use a php session on each of the files
<?php session_start();
if(!isset(mySessionValue)){
header('Location:sitenam.com/index.php');
}?>

Answer 2

At the top of the .htaccess file in the document root you can block (or redirect) any direct access to certain directories/files using mod_rewrite. For example:
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/resources
RewriteRule ^ - [F]
The above would send a 403 Forbidden for any URLs (ie. direct requests from the user) that start /resources.
Sending a 403 would be the preferred response, however, if you wanted to redirect the user to the index page, change the above RewriteRule to read:
RewriteRule ^ / [R,L]