AttributeFilter::getFieldValue PHP Метод

    public function getFieldValue(Attribute $attribute, $mode = null)
    {
        if (null !== $mode) {
            $data = Yii::app()->getRequest()->getParam($attribute->name);
            return is_array($data) && array_key_exists($mode, $data) ? $data[$mode] : null;
        }
        return Yii::app()->getRequest()->getParam($this->getFieldName($attribute, $mode), null);
    }