YII2: How to add ICON in the gridview header

Question

How to add an icon beside the header of a GRIDVIEW?

something like this.

[
   'attribute' => 'address',
   'format'=>'raw',
   'label'=>'<i class=\"fa fa-map\"><\i>test',
],

Answer 1

You should set 'encodeLabel' property of DataColumn to false

        [
            'attribute' => 'address',
            'label' => '<span class="glyphicon glyphicon-star">' ,
            'encodeLabel' => false,
        ],