如何添加搜索栏？

Question

我设法合并了两列。但搜索栏不见了。如何添加搜索栏？ 这是代码：

echo GridView::widget([
                        'dataProvider' => $dataProviderAcad,
                        'filterModel' => $searchModelAcad,
                        'columns' => [
                            'prog_and_remark_combined' => [
                                'format' => 'raw',
                                'label' => "Programme Name",
                                'value' => function ($data) {
                                    return nl2br(
                                        $data->NAME_PROG_ENG .
                                        "\r\nPreviously known as: " .
                                        $data->REMARKS
                                    );
                                }
                            ],

Answer 1

在 AcadSearch 类中为 prog_and_remark_combined 添加一个公共变量

    class YourModelAcadSearch extends YourModelAcad
    {

        public $prog_and_remark_combined;

        /**
         * @inheritdoc
         */
        public function rules()
        {
            return [
            ....