Hi Expert,
I’m new to gridview. want to have Search function on the gridview data. Can I know how to enable ?
<?php
$gridColumns = [
    [
        'class' => '\kartik\grid\CheckboxColumn',
        'headerOptions' => ['class'=>'kartik-sheet-style'],
        'rowSelectedClass' => GridView::TYPE_WARNING,
    ],
        ['class' => 'yii\grid\SerialColumn'],
    [
        'attribute' => 'unique_id',
        'value' => function ($model) {
            if (isset($model->unique_id)) {
                return StringHelper::truncate(Html::encode($model->unique_id), 20);
            }
            return null;
        }
    ],
    [
    'class'=>'kartik\grid\BooleanColumn',
    'attribute'=>'formupd_flag',
    'trueIcon'=>'<span class="glyphicon glyphicon-ok text-success"></span>',
    'falseIcon'=>'<span class="glyphicon glyphicon-remove text-danger"></span>',
    'vAlign'=>'middle',
    ],
    ['class' => 'kartik\grid\ActionColumn',
        'controller' => 'accesscontrols2',
        'visible' => true,
        'dropdown'=> true,
        'dropdownButton' => ['class'=>'btn btn-primary'],
        'dropdownOptions' => ['class' => 'pull-right'],
        'buttons' => [
                 //delete button
                'delete' => function ($url) 
                    {
                    $options = array_merge([
                        'title' => Yii::t('app', 'Delete'),
                        'aria-label' => Yii::t('app', 'Delete'),
                        'data-confirm' => Yii::t('app', 'Are you sure you want to delete this Unique ID from Access Control?'),
                        'data-method' => 'post',
                        'data-pjax' => '0',
                    ], []);
                    return '<li>'.Html::a(
                        '<span class="glyphicon glyphicon-bin"> </span> '.
                        Yii::t('app', 'Delete'),
                        $url,
                        $options
                    ).'</li>';
                     },
                 ], 
            'urlCreator' => function ($action, $model) 
                {
                if ($action === "delete") {
                    $url = Url::to(['deleteuniqueid', 'id' => $model->id]);
                    return $url;
                }
                return '';
            },
            'template' => Yii::$app->user->can('edit_own_content') ?
                '{delete}' :
                '{view}',
        ],
    ];
?>
    <div class="google-analytics-index">
        <div class="row">
            <div class="col-md-12">
               <?= 
                GridView::widget([
                    'id' => 'accesscontrols-grid',
                    'dataProvider' => $dataProvider,
                    'filterModel'=>$searchModel,
                    'columns' => $gridColumns,
                    'resizableColumns' => false,
                    'pjax' => false,
                    'export' => false,
                    'responsive' => true,
                    'bordered' => true,
                    'striped' => true,
                    'panelTemplate' => '<div class="panel {type}">
                    {panelHeading}
                    {panelBefore}
                    {items}
                    <div style="text-align: center">{pager}</div>
                </div>',
                    'panel' => [
                        'type'=>GridView::TYPE_INFO,
                        'heading'=> Yii::t('accesscontrols', 'Access Controls') . ' <small class="panel-subtitle hidden-xs">'.
                            Yii::t('accesscontrols', 'Unique ID Listing').'</small>',
                        'footer'=>false,
                        // Visible only for admin user
                        'before'=> (!empty(Yii::$app->user) && Yii::$app->user->can("admin")) ?
                            ActionBar::widget([
                                'grid' => 'accesscontrols-grid',
                                'templates' => [
                                    '{bulk-actions}' => ['class' => 'col-xs-6 col-md-2 col-md-offset-10'],
                                ],         
                                'bulkActionsItems' => [
                                    'General' => ['general-delete' => 'Delete'],
                                ],
                                'bulkActionsOptions' => [
                                    'options' => [
                                        'general-delete' => [
                                            'url' => Url::toRoute('delete-multiple'),
                                            'data-confirm' => Yii::t(
                                                'accesscontrols',
                                                'Are you sure you want to delete these Unique ID from Access Controls? All data related to each item will be deleted. This action cannot be undone.'
                                            ),
                                        ],
                                    ],
                                'class' => 'form-control',
                                ],
                            ]
                             ) : null,
                    ],
                    'toolbar' => false
                ]);
                ?>
            </div>
        </div>
    </div>