Yii2 how can I use a like query for first character only

How can I use a like query and limit to the first character only for example my code below works however it does it for all characters for example if an item was called end it would appear in e, n & d rather than just e the starting character/letter.

Current Query/Code

   public function actionAlphabet($id)


    $this->layout = 'directory';

    $query = Directory::find()

    ->where(['LIKE', 'name', $id]);

    $dataProvider = new ActiveDataProvider([

        'query' => $query


    return $this->render('index', [

        'dataProvider' => $dataProvider,