I have a checkbox list in my yii2 forum.
It is like this.
 <?php
             $list = ArrayHelper::map(Publisher::find()->all(),'user_id','name');
             echo $form->field($model, 'publisher_name')->widget(Select2::classname(),[
               'data' => $list,
                'options' => [
                  'multiple' => true,
                  'placeholder' => 'Choose publishers'
                ]
             ]);
            ?>
It is taking values from the database. Also, I have used for each to populate the model in the controller. Now I want to populate this checkbox list with the drop downs.
My drop downs are as follows.
<?= $form->field($model, 'country')->dropDownList(Countries::getCountries(),
                        ['id' => 'country_id', 'prompt' => 'Select  countries'])
                    ?>
And
   <?= $form->field($model, 'state')->widget(DepDrop::classname(), [
                            //'data' => Regions::getRegions($model->country),
                            'options' => ['id' => 'region_id', 'prompt' => 'Choose a country first'],
                            'pluginOptions' => [
                                'depends' => ['country_id'],
                                'placeholder' => 'Select a state',
                                'url' => Url::to(['/regions/regions'])
                            ]
                        ]) ?>
And
<?= $form->field($model, 'city')->widget(DepDrop::classname(), [
                            //'data' => Cities::getCities($model->country),
                            'options' => ['id' => 'city_id', 'prompt' => 'Select a state'],
                            'pluginOptions' => [
                                'depends' => ['country_id','region_id'],
                                'placeholder' => 'Select',
                                'url' => Url::to(['/cities/cities'])
                            ]
                        ]) ?>
And there are more drop downs whIch I will use I want to know what all are the ways i can populate the checkbox list? Are there any ways to do that?