How can i retain and show a selected value from a dropdownList in itself after reloading the page until it would be changed again by user?

In my View

<?php $searchModel = new AgahiSearch();?>

            <?php $form = ActiveForm::begin([



                'options' => ['data-pjax' => true ]


<?php $catobject = new Category();?>

                    <?php $a = ArrayHelper::map(Category::find()->where(['parent_id'=>'y'])->All(),'id','name');?>

                    <?= $form->field($catobject, 'parent_id')->dropDownList($a, [


                        'prompt'=>' select your group ',

                        'options' =>['data-pjax' => true ]


in my Model

public function search($params)


        $query = Agahi::find();

        $dataProvider = new ActiveDataProvider([

            'query' => $query


        if (!($this->load($params) && $this->validate())) {

            return $dataProvider;


        $query->andfilterWhere(['like','title', $this->title])



        return $dataProvider;


in my Controller

 public function actionSearch()


        $searchModel = new AgahiSearch();

        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

        $modelCatsite= Category::find()->where(['parent_id'=>'y'])->All();

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

            'dataProvider' => $dataProvider,

            'modelCatsite' => $modelCatsite,





One solution is not to reload page (e.g. to use ajax or popup page to update model data).

Another solution is to store search criteria in a cookie or session and apply them to search model before loading request arguments.