I want create a Typical Controller and extends all controller from it, but CI don't find

[eluser]Zorancho[/eluser]
First thing, create new file at application/libraries folder and name it MY_Controller.php
If you want to change the prefix MY, go to application/config/config.php file, on line 106 you got this: $config['subclass_prefix'] = 'MY_'; which means you can add your own subclass prefix.
You need this when you extend core classes from CI.
In MY(or whatever your prefix is)_Controller.php file, create new class.

Code:

//This is parent of all of your controllers from application/controllers folder.
class MY(or whatever your prefix is)_Controller extends Controller
{
   //You will execute parent's constructor and inherit all of its methods.
   function __construct()
   {
      parent::__construct();
   }

   //All methods here can be used in your controllers like: $this->sharedFunction();
   public function sharedFunction()
   {
      echo 'I am available in all of your controllers';
   }
}


//You can create one parent for the front controllers.
class Front_Controller extends MY(or whatever your prefix is)_Controller
{
   public function __construct()
   {
      parent::__construct();
   }
  
   public function frontFunction()
   {
      echo 'I am available in all of your front controllers';
   }
  
}

//One for the admin part in the same file.
class Admin_Controller extends MY(or whatever your prefix is)_Controller
{
   public function __construct()
   {
      parent::__construct();
   }
  
   public function adminFunction()
   {
      echo 'I am available in all of your admin controllers';
   }
  
}

Then in your application/controllers/home.php

Code:

class Home extends Front_Controller
{
   public function __construct()
   {
      parent::__construct();
   }

   public function index()
   {
      $this->frontFunction();
   }
}

In your application/controllers/admin/dashboard.php

Code:

class Dashboard extends Admin_Controller
{
   public function __construct()
   {
      parent::__construct();
   }

   public function index()
   {
      $this->adminFunction();
   }
}

Hope it helps