root/trunk/system/libraries/Controller.php

<?php defined('SYSPATH') or die('No direct script access.');
/**
 * Kohana Controller class. The controller class must be extended to work
 * properly, so this class is defined as abstract.
 *
 * $Id$
 *
 * @package    Core
 * @author     Kohana Team
 * @copyright  (c) 2007-2008 Kohana Team
 * @license    http://kohanaphp.com/license.html
 */
abstract class Controller_Core {

    // Allow all controllers to run in production by default
    const ALLOW_PRODUCTION = TRUE;

    /**
     * Loads URI, and Input into this controller.
     *
     * @return  void
     */
    public function __construct()
    {
        if (Kohana::$instance === NULL)
        {
            // Set the instance to the first controller loaded
            Kohana::$instance = $this;

            // URI should always be available
            $this->uri = new URI;

            // Input should always be available
            $this->input = new Input;
        }
        else
        {
            // URI should always be available
            $this->uri = Kohana::$instance->uri;

            // Input should always be available
            $this->input = Kohana::$instance->input;
        }
    }

    /**
     * Includes a View within the controller scope.
     *
     * @param   string  view filename
     * @param   array   array of view variables
     * @return  string
     */
    public function _kohana_load_view($kohana_view_filename, $kohana_input_data)
    {
        if ($kohana_view_filename == '')
            return;

        // Buffering on
        ob_start();

        // Import the view variables to local namespace
        extract($kohana_input_data, EXTR_SKIP);

        // Views are straight HTML pages with embedded PHP, so importing them
        // this way insures that $this can be accessed as if the user was in
        // the controller, which gives the easiest access to libraries in views
        include $kohana_view_filename;

        // Fetch the output and close the buffer
        return ob_get_clean();
    }

} // End Controller Class