I’m using GirdView and Active data provider to view my tables data my code at view :
<?= GridView::widget([
'tableOptions' => ['class' => 'table table-striped table-bordered'],
'dataProvider' => $projectsDataProvider,
'columns' => [
['class' => 'yii\grid\SerialColumn'],
'project_name',
'client_name',
'client_representative',
'client_email',
'project_type',
'project_manager',
'project_location',
'project_type2',
'project_manager2',
'project_location2',
['class' => 'yii\grid\ActionColumn'],
]);
?>
when i increase the number of columns it goes out of border as shown in picture