How to specify its value for a value prompt in the drop-down list:
<?= $form->field($model, 'table_id')->label(")->dropdownList( Table::find()->select(['row_name', 'id'])->indexBy('id')->column(), ['prompt' =>'Prompt', 'class'=>", 'id'=>", 'options' => [ 4 => ['data-image' => ", 'data-html-text'=>"], 6 => ['data-image' => ", 'data-html-text'=>"], 9 => ['data-image' => ", 'data-html-text'=>"], ] ]); ?>
The actual
'prompt' =>'Prompt',
Returns in html
Prompt
Have not found a way how to prompt to ask for value.