title: echo in codeigniter controller is not working
body: <p>echo in codeigniter controller is not working.. Is there any setting in config to enable echo in codeigniter. All other files are working except those which are having echo in controllers.</p>
  
  <pre><code> &lt;?php
  class Blog extends CI_Controller {
  
      public function index()
      {
          echo 'Hello World!';
      }
  }
  </code></pre>
  
  <p>Basically iam testing jquery and condeigniter sample script given in <a href="http://www.ryantetek.com/2009/12/how-to-create-a-simple-ajax-post-in-codeigniter-using-jquery" rel="nofollow">http://www.ryantetek.com/2009/12/how-to-create-a-simple-ajax-post-in-codeigniter-using-jquery</a>. but i found script is not working because echo statement in controller.
  please help me.</p>
  
  <p>error: "This webpage is not available"..</p>