frontend/controllers/SiteController.php

<?php
    namespace frontend\controllers;
    
    use artbox\core\models\Feedback;
    use common\models\blog\Article;
    use common\models\Settings;
    use common\models\slider\Slide;
    use Yii;
    use yii\filters\VerbFilter;
    use yii\helpers\Json;
    use yii\swiftmailer\Mailer;
    use yii\web\BadRequestHttpException;
    use yii\web\Controller;
    use yii\web\Response;
    
    /**
     * Site controller
     */
    class SiteController extends Controller
    {
        /**
         * @inheritdoc
         */
        public function actions()
        {
            return [
                'error' => [
                    'class' => 'yii\web\ErrorAction',
                ],
            ];
        }
        
        /**
         * @inheritdoc
         */
        public function behaviors()
        {
            return [
                'verbs' => [
                    'class'   => VerbFilter::className(),
                    'actions' => [
                        'feedback' => [ 'post' ],
                    ],
                ],
            ];
        }
        /**
         * Displays homepage.
         *
         * @return mixed
         */
        public function actionIndex()
        {
        	$model=new Feedback();
        	$model->setScenario(Feedback::SCENARIO_CALLBACK);
            $slides = Slide::find()->with('language')->where(['status' => true])->orderBy('sort')->all();
            $articles = Article::find()
                               ->with('language')
                               ->where([ 'status' => true ])
                               ->orderBy('sort DESC')
                               ->limit(4)
                               ->all();
            return $this->render('index', [
                'slides'        => $slides,
                'articles'      => $articles,
	            'model'         => $model
            ]);
        }
        
        /**
         * Action to view robots.txt file dinamycli
         *
         * @return string
         */
        public function actionRobots()
        {
            $response = \Yii::$app->response;
            /**
             * @var Settings $settings
             */
            $settings = Settings::find()
                                ->one();
            $temp = tmpfile();
            fwrite($temp, $settings->robots);
            $meta = stream_get_meta_data($temp);
            $response->format = $response::FORMAT_RAW;
            $response->headers->set('Content-Type', 'text/plain');
            return $this->renderFile($meta[ 'uri' ]);
        }
        
    }