扩展核心CI_Controller

Question

According to this Extending core CI Classes , I can create a class in my application/core/MY_Protectedcontroller.php as:

   //e.g. I want to extend core CI_Controller class.So
   class MY_Protectedcontroller extends CI_Controller{
      function __construct(){
        parent::__construct();
        $this->load->library('permission');
        $this->load->library('authentication');
      }
    }

Well as you might discern my objective here..actually I want the auth and perm libraries to be available to all of my controllers thus I can authenticate very easily and programmatically. But when I tried to do:

    class User extends MY_Protectedcontroller{
      function __construct(){
        parent::__construct();
        .....// relevant codes
        .....//relevant codes
      }
    }

It says the "Not Found" thing. Fatal error: Class 'MY_Protectedcontroller' not found in C:\xampp\htdocs\damcombd\application\controllers\admin\user.php on line 3

Answer 1

You have to name your class file MY_Controller.php, NOT MY_Protectedcontroller.php.

As you can see in the user guide, in the System Class list, MY_Protectedcontroller is not there. You have to extend an existing class, and you have to name it appropriately for CodeIgniter to find it. In this case, we're extending Controller, so you have to name the file MY_Controller.php so that CodeIgniter recognizes and finds it (you can change MY_ in the config as you've found). If we were trying to extend the Input class, we would name the file MY_Input.php and so on.

---

Download Codeigniter 2.1.4 and put it somehwere.

Create MY_Controller.php and put it in application/core/MY_Controller.php:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class MY_Protectedcontroller extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
    }
}

Create a controller test.php and put it in controllers/test.php:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Test extends MY_Protectedcontroller
{
    function index()
    {
        echo "test";
    }
}

and visit http://localhost/ci-2.1.4/index.php/test