title: Call function A inside function B on Codeigniter's controller
body: <p>I have a controller that have about 5-6 functions.</p>
  
  <pre><code>class Register extends CI_Controller {
  public function index()
  {
    //  some code written
  }    
  public function Add()
  {
    //  Some code written
  }
  public function xyz()
  {
    //  Some code written
    $this-&gt;abc();
  }
  public function abc()
  {
    // Some code written
  }
  }
  </code></pre>
  
  <p>In <code>xyz</code> function, i want to call <code>abc</code> function.
  Is this possible ? if so, how to call it ?</p>