frontend/widgets/Slider.php

<?php
namespace frontend\widgets;
use yii\base\Widget;
class Slider extends Widget
{
    public $title;
    public function init(){
        parent::init();
    }
    public function run()
    {
            $slider = \common\models\Slider::find()->where([\common\models\Slider::tableName().'.title'=>$this->title])->joinWith("sliderImage")->one();
            if($slider instanceof  \common\models\Slider){
                return $this->render('slider',[
                    'slider'=>$slider,
                    'title'=>$this->title
                ]);
            }
    }
}