How execute a controller in a sub-folder using a URL in Codeigniter?

Question

How can I execute a controller ia sub-folder using a URL in Codeigniter?

If I have the next controllers y controllers folder:

-/controllers/
      |---------controller1.php
      |---------/sub-folder/
                     |---------controller2.php

I can execute controller1.php using a URL similar to this: example.com/index.php/controller1/function/param

But, How can I execute controller2.php ?

Very important:

=> make sure your sub folder name is not any of the controller's name

=> make sure your class name and file name is same**

Answer 1

This should work:

 example.com/index.php/sub-folder/controller2/function/param

=> make sure your sub folder name is not any of the controller's name

=> make sure your class name and file name is same

Answer 2

你可以执行

example.com/index.php/sub-folder/controller2/function/param