an></code> class is extending the
<code class="docutils literal"><span class="pre">CI_Controller</span></code> class. This means that the new pages class can access the
methods and variables defined in the <code class="docutils literal"><span class="pre">CI_Controller</span></code> class
(<em>system/core/Controller.php</em>).</p>
<p>The <strong>controller is what will become the center of every request</strong> to
your web application. In very technical CodeIgniter discussions, it may
be referred to as the 