How do I enable my Query button in my view?

SaleItems = And a table mysql database.

<?php

&lt;?= GridView::widget([


    'dataProvider' =&gt; &#036;dataProvider,


    'filterModel' =&gt; &#036;searchModel,


    'formatter' =&gt; ['class' =&gt; 'yii&#092;i18n&#092;Formatter','nullDisplay' =&gt; ''],


    'columns' =&gt; [


        ['class' =&gt; 'yii&#092;grid&#092;SerialColumn'],


        **[


        'attribute' =&gt; 'Data',


            'content' =&gt; function(SaleItems &#036;model, &#036;key, &#036;index, &#036;column) {


                return date('d/m/Y', strtotime(&#036;model-&gt;sale-&gt;date));


                },


            'header' =&gt; 'DATA'


        ],**


]); ?&gt;

</div>

You have syntax error,

content only accepts $model, $key, $index, $column parameters

check here,

link