Extended core class not found - php

Question

I have some codeigniter application. It works well on my local server. After I uploaded it to the hosting server it won't work and resulting an error:
Fatal error: Class 'System_Controller' not found in /home/k2113138/public_html/test/application/controllers/login.php on line 3
Here is my System Controller that extending CI_Controller:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
//location: application/core/
class System_Controller extends CI_Controller {
public function __construct(){
parent::__construct();
//some code
}
}
my controller:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
//location: application/controllers/
class Login extends System_Controller {
public function __construct()
{
parent::__construct();
}
}
i have set my config as my desired configuration like this:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
$config['base_url'] = 'http://xx.com/subfolder/';
$config['subclass_prefix'] = 'System_';
?>
I have read many article that discuss this matter but still cannot found the solution. Really confuse about the problem, because everything works well in local server. I have configured the config file as what it's needed like the database and the routes configuration. Is there any other things that i need to re-configure?
EDIT: My Codeigniter version is 2.1.3

Answer 1

Ok, you changed the filename to lowercase, now, try change the classname too:
class system_controller extends CI_Controller
If don't run, play with the classname and the filename, this is a problem of your server, very common in shared servers.
Sometimes, the PHP version and its configuration, play a important rol in this cases.