title: Codeigniter, php5, Fatal error: Class 'Controller' not found
body: <p>Fatal error: Class 'Controller' not found in <code>&lt;local_path&gt;\system\application\controllers\welcome.php</code> on line 3</p>
  
  <pre><code>&lt;?php
  
  class Welcome extends Controller {
  
      function __construct()
      {
          parent::Controller();   
      }
  
      function index()
      {
          $this-&gt;load-&gt;view('welcome_message');
      }
  }
  
  /* End of file welcome.php */
  /* Location: ./system/application/controllers/welcome.php */
  </code></pre>
  
  <p>I am beginner in php frameworks just extracted the CodeIgniter zip file and tried to run welcome.php controller in Aptana studio. ( PHP 5 )</p>