activerecord - yii2 inserting 2 params as text inside dropdownlist -

here yii2 drop down list.

 <?php  echo $form->field($model, 'param1')->dropdownlist(             arrayhelper::map(model::find()->all(),'param1','param2'); 

it makes drop down list values of param1s , text choose of param2s. see param2 texts , choose 1 , corresponding param1 value goes server.

no problem want same show user not param2 text want text constructed param2+param3.

example of want.

hidden value___________text

1_____________________alpha

2_____________________bravo

3_____________________lima

hidden value___________text

1_____________________alpha-red

2_____________________bravo-white

3_____________________lima-blue

is possible ?

one of ways using built-in arrayhelper toarray() method.

put in model:

use yii\helpers\arrayhelper;  ...  public static function getlist() {     $initialmodels = static::find()->all();     $models = arrayhelper::toarray($initialmodels, [         'app\models\yourmodel' => [             'param1',             'combinedparam' => function ($model) {                 return "$model->param2 - $model->param3";             },         ],     ]);      return arrayhelper::map($models, 'param1', 'combinedparam'); } 

displaying in view:

<?= $form->field($model, 'param1')->dropdownlist(yourmodel::getlist()) ?>