yii2显示图片

$this->registerCssFile(Yii::$app->request->baseUrl.'/css/zoom.css');
$this->registerJsFile(Yii::$app->request->baseUrl.'/js/zoom.js');

[
                'attribute' => 'img',
                'format' => ['image', ['width'=>'120', 'height'=>'150','data-action'=>"zoom"]],
                'value' => function ($model) {
                    return "/".$model->img;
                }
            ],