Codeigniter 3.1.0 Overview

Config folder files -

• autoload- We need to include library in autoload before used so it will load automatically when needed.
• database- to include DB
• route- to handle default controllers like 404 welcome etc

Index.php - Any Url Request will be handle by this file like (about us or contact us)

• index.php/[controller]/[method]
• Controllers and functions/methods are defined in this file
• Initially We Need to Define Controller like Welcome.php
• multple functions/method in controller
• class Welcome extends CI_Controller {
• File must be protected following this condition
• defined('BASEPATH') OR exit('No direct script access allowed');
• If we call to (index.php/Welcome.php/)
• It shows error because we didn't define index () function
• public function index()
• {
• $this->load->view('welcome_message');
• }
• But if we call to another function Public function test ()
• (index.php/Welcome.php/test)
• It will works even without index () function