PHP: Yii2 kartik dynagrid

gistfile1.txt

<?= DynaGrid::widget([
    'columns' => $columns,
    'theme'=>'panel-info',
    'showPersonalize'=>true,
    'storage'=>'cookie',
    'gridOptions'=>[
        'pjax' => true,
        'dataProvider'=>$dataProvider,
        'filterModel'=>$searchModel,
        'floatHeader'=>true,
        'options'=>['id'=>'grid-1'], // a unique gridID is important
        'panel'=>[
            'heading'=>'<h3 class="panel-title"><i class="glyphicon glyphicon-book"></i>Appointments</h3>',
            'before' =>  '<div style="padding-top: 7px;"><em>Healing happens above, down, inside out.  Move the bone, doctor.</em></div>',
            'after' => false
        ],        
        'toolbar' =>  [
            ['content'=>
                Html::button('<i class="glyphicon glyphicon-plus"></i>', ['type'=>'button', 'title'=>'Add Book', 'class'=>'btn btn-success', 'onclick'=>'alert("This will launch the book creation form.\n\nDisabled for this demo!");']) . ' '.
                Html::a('<i class="glyphicon glyphicon-repeat"></i>', ['dynagrid-demo'], ['data-pjax'=>0, 'class' => 'btn btn-default', 'title'=>'Reset Grid'])
            ],
            ['content'=>'{dynagridFilter}{dynagridSort}{dynagrid}'],
            '{export}',
        ]
    ],
    'options'=>['id'=>'dynagrid-1'] // a unique identifier is important
]);
if (substr($dynagrid->theme, 0, 6) == 'simple') {
    $dynagrid->gridOptions['panel'] = false;
}
 ?>