yii2:drop-down list for multiple values concat in one line

Question

for my drop-down list I am using this code.

field($medicinerequest, \'[\' . $id . \']\' . \'medicine_name\')
->DropDownList(ArrayHelper::         


        

Answer 1

The anonymous function could be

function ($element) {
   return $element['medicine_name'] . '-'. $element['medicine_id'];
}

You can check here!