CodeIgniter path constants definitions

Question

I have come across this page

https://www.codeigniter.com/user_guide/general/reserved_names.html

Could someone please explain to me what fo

Answer 1

SELF = index.php

Use when you want to include something from your root folder
FCPATH = C:\xampp\htdocs\your_root_folder\

Use when you want to include something from your application folder
APPPATH = C:\xampp\htdocs\your_root_folder\application\

BASEPATH = C:\xampp\htdocs\your_root_folder\system\