title: getting this error Namespace declaration statement has to be the very first statement in the script
body: <p>Get this error:</p>
  
  <blockquote>
    <p>Namespace declaration statement has to be the very first statement in the script</p>
  </blockquote>
  
  <p>On very start of this code:</p>
  
  <pre><code>namespace app\controllers;
  use yii\web\Controller;
  use app\models\users;
  
  class UserController extends Controller
  {
       public function actionIndex()
       {
           echo "working on .....";
       }
  }
  </code></pre>