Codeigniter - switch root folder

Question

As I know, the root folder for a codeigniter app is set in "ci.php" with the $application_folder variable.

Is it possible to change this variable dynamically ?

For example at at some point, in some controller, I want to switch the root dir from "main_root" folder to "another_root" folder ?

Answer 1

The application folder is set in the index.php, for example:

$application_folder = '../application';

That is the best place to change it dynamically.