public function actionSample(){if (Yii::$app->request->isAjax) {  $data = Yii::$app->request->post();  $searchname= explode(":", $data['searchname']);  $searchby= explode(":", $data['searchby']);  $searchname= $searchname[0];  $searchby= $searchby[0];  $search = // your logic;  /Yii::$app->response->format = /yii/web/Response::FORMAT_JSON;  return [    'search' => $search,    'code' => 100,  ]; }}

$.ajax({    url: '<?php echo Yii::$app->request->baseUrl. '/supermarkets/sample' ?>',    type: 'post',    data: {searchname: $("#searchname").val() , searchby:$("#searchby").val()},    success: function (data) {     console.log(data.search);    }});