Swears on class. Yii2: Models

I do not understand why the error?

syntax error, unexpected 'class' (T_CLASS), expecting ',' or ';' in C:\xampp\htdocs\controllers\EmployeeController.php <?php namespace app\controllers; use yii\web\Controller; use app\models\Employee class EmployeeController extends Controller { public function actionIndex() { } } 

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 <?php namespace app\models; use yii\base\Model; class Employee extends Model{ public $firstName; public $lastName; public $middleName; public $salary; }