title: External Php class in Yii?
body: <p>Hello I need to use evalmath.class.php within a Yii application. How can I include it from my controller?</p>
  
  <p>Something like this:</p>
  
  <pre><code>public function actionFormulas() {
      include('models/evalmath.class.php');
      $m = new EvalMath;
      ...
  }
  </code></pre>
  
  <p>But the above code does not work. How can I include an external class within a controller?</p>