/** * 根据条件更新数据 * @param $set 插入字段的值 * @return 返回插入的记录数 */ public static function addReturnProducts($set) { self::initDB(); $sql = "INSERT INTO " . self::$table . " {$set}"; if (!self::$dbConn->query($sql)) { self::$errCode = "1501"; self::$errMsg = "addReturnProducts"; return false; } else { return self::$dbConn->affected_rows(); } }