Code-igniter controllers file name can not start with capital letter - php

Question

I was using small letter for controller file name before,
however, recently move the file to other server that need to controller name to be start with capital
=========================================
Here is the rename example :
file name: Home.php
$route['default_controller']: "home";
link: http://example.com/index_folder/
==========================================
it show error of
Unable to load your default controller. Please make sure the controller specified in your Routes.php file is valid.
And when I change the route to
$route['default_controller']: "Home";
it still show the same error,
Only success if I go to
http://example.com/index_folder/Home/
How to fix that? Thanks for helping
Update
Here is the htaccess file, at the root of the project folder:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
The reason of rename is it seems the new server has problem if my Controller is in lower case

Answer 1

Linux is case sensitive, keep the file name and class name same and try again. It will work.
The same code will work fine on windows but give exception on Linux.

Answer 2

As per Documentation,
class Home extends CI_Controller {
public function index()
{
echo 'Hello World!';
}
}
Then save the file to your application/controllers/ directory.
Important:-
The file must be called ‘Home.php’, with a capital ‘H’.
Now visit the your site using a URL similar to this:
example.com/index.php/home/
CodeIgniter can be told to load a default controller when a URI is not present, as will be the case when only your site root URL is requested.
To specify a default controller, open your application/config/routes.php file and set this variable:
$route['default_controller'] = 'home';
Where ‘home’ is the name of the controller class you want used.
If you now load your main index.php file without specifying any URI segments you’ll see your “Hello World” message by default.