子字符串Yii2中select2的文本值

use yii\helpers\Html;
use yii\widgets\ActiveForm;

$form = ActiveForm::begin();
echo $form->field($model, 'attribute')->widget(\kartik\select2\Select2::classname(), [
    'data' => $data,
    'options' => ['placeholder' => 'Select a value...'],
    'pluginOptions' => [
        'allowClear' => true
    ],
])->label(false);
ActiveForm::end();

public function actionSubmitForm()
{
    $model = new YourModel();
    if ($model->load(Yii::$app->request->post()) && $model->validate()) {
        // 获取select2的文本值
        $textValue = $model->attribute;
        // 其他操作...
    }
}