ARArea::getName PHP Method

    public static function getName($id, $grade = self::GRADE_CITY)
    {
        return Yii::app()->db->createCommand()->select('name')->from('area')->where('id=:id and grade=:grade', array(':id' => $id, ':grade' => $grade))->queryScalar();
    }

 public static function cityInfo($data)
 {
     $str = '';
     if ($data['city_id'] == 0) {
         $str .= '全国';
     } else {
         $str .= ARArea::getName($data['city_id']);
         $str .= ARArea::getName($data['area_id'], ARArea::GRADE_AREA);
     }
     return $str;
 }