Helpers

HTML::a

// both the same
return Html::a($data->naam, ['/examen/update?id='.$data->id],['title'=> 'Edit',]);
return Html::a($data->naam, ['/examen/update', 'id'=>$data->id], ['title'=> 'Edit',]);

 

Array helper

use yii\helpers\ArrayHelper;

$dropdownlist = Arrayhelper::map($student,'id','naam');

//input [ [ 'id' => '999', 'naam' => 'Mark de Groot'], [ 'id' => ..... ], [ ....], ....]
//result [ '999' => 'Mark de Groot', ...];