title: Yii difference between rendering functions
body: <p>I sometimes get messed up by the three rendering methods:</p>
  
  <ul>
  <li><code>Controller::render()</code></li>
  <li><code>Controller::renderPartial()</code></li>
  <li><code>Controller::renderFile()</code></li>
  </ul>
  
  <p>Please could you explain. Thank you!</p>