codeigniter only pages to an existing website - php

Question

My website structure somewhat looks like below
css/
lib/
js/
index.php
profile.php
products.php
checkout.php
orders.php
invoice.php
I have added a codeigniter folder in there ...
codeigniter/application/
codeigniter/application/controllers/
codeigniter/application/controllers/mycontroller.php
and other files
I can access CodeIgniter stuff by going to mywebsite.com/codeigniter/mycontroller etc fine.
However, I want to get rid of /codeigniter/ part from the URL. So I was wondering if it is possible to create a whitelist of the files which are CodeIgniter specific? For example, if the URL is mywebsite.com/mycontroller then it does CI stuff otherwise it looks for the plain PHP code file. I have only a couple of CI controllers and loads other non-CI files.
Any ideas?

Answer 1

I think you could use .htaccess to rewrite URL's that don't contain .php, css, lib and js. Something like:
RewriteCond %{REQUEST_URI} !^(\.php|css|js|lib)$
RewriteRule (.*) codeigniter/index.php/$1
So:
http://example.com/css/test.css
stays
http://example.com/css/test.css
(as will all requests to css|lib|js. You can append more things here for the rewrite to ignore)
http://example.com/controller/method
becomes
http://example.com/codeigniter/index.php/controller/method
You can test it out here: http://htaccess.madewithlove.be/
More on rewriting: http://httpd.apache.org/docs/current/mod/mod_rewrite.html

Answer 2

Short-term Solution
You can start by simply converting the index.php file into a controller and name it whatever you wish:
<?php
class New_default_controller extends CI_Controller {
public function index()
{
// home page stuff here
}
}
Alter the route.php file and set your default controller so that simply visiting your site will trigger the proper controller:
$route['default_controller'] = 'new_default_controller';
Apply the instructions for Removing the index.php file
Now calls to www.mysite.com/profile.php will access the profile.php at your root and calls to www.mysite.com/new_future_page will call your new_future_page controller.
Please let me know if any of this is confusing or you get stuck.
Optimal Solution
I wanted to leave a comment above but this would have been impossible to show as a comment.
You will have to take your PHP files and put them in the controllers folder like this:
codeigniter/application/controllers/profile.php
codeigniter/application/controllers/products.php
codeigniter/application/controllers/checkout.php
codeigniter/application/controllers/orders.php
codeigniter/application/controllers/invoice.php
Please go through and do the Tutorial before continuing any further. Specifically the Static Pages section will help you in achieving your goal.
You will have to convert your current PHP files to follow the flow of CodeIgniter