1 <?php
2 /* --------------------------------------------------------------
3 CustomerNumberInterface.inc.php 2015-02-18 gm
4 Gambio GmbH
5 http://www.gambio.de
6 Copyright (c) 2015 Gambio GmbH
7 Released under the GNU General Public License (Version 2)
8 [http://www.gnu.org/licenses/gpl-2.0.html]
9 --------------------------------------------------------------
10 */
11
12 /**
13 * Value Object.
14 *
15 * Interface CustomerNumberInterface
16 *
17 * Represents a customer number.
18 *
19 * @category System
20 * @package Customer
21 * @subpackage Interfaces
22 */
23 interface CustomerNumberInterface
24 {
25 /**
26 * Returns the equivalent string value.
27 * @return string Equivalent string value.
28 */
29 public function __toString();
30 }