1 | <?php |
---|
2 | /** |
---|
3 | * Zend Framework |
---|
4 | * |
---|
5 | * LICENSE |
---|
6 | * |
---|
7 | * This source file is subject to the new BSD license that is bundled |
---|
8 | * with this package in the file LICENSE.txt. |
---|
9 | * It is also available through the world-wide-web at this URL: |
---|
10 | * http://framework.zend.com/license/new-bsd |
---|
11 | * If you did not receive a copy of the license and are unable to |
---|
12 | * obtain it through the world-wide-web, please send an email |
---|
13 | * to license@zend.com so we can send you a copy immediately. |
---|
14 | * |
---|
15 | * @category Zend |
---|
16 | * @package Zend_Validate |
---|
17 | * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) |
---|
18 | * @license http://framework.zend.com/license/new-bsd New BSD License |
---|
19 | * @version $Id: Issn.php 20785 2010-01-31 09:43:03Z mikaelkael $ |
---|
20 | */ |
---|
21 | |
---|
22 | /** |
---|
23 | * @see Zend_Validate_Barcode_AdapterAbstract |
---|
24 | */ |
---|
25 | require_once 'Zend/Validate/Barcode/AdapterAbstract.php'; |
---|
26 | |
---|
27 | /** |
---|
28 | * @category Zend |
---|
29 | * @package Zend_Validate |
---|
30 | * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) |
---|
31 | * @license http://framework.zend.com/license/new-bsd New BSD License |
---|
32 | */ |
---|
33 | class Zend_Validate_Barcode_Issn extends Zend_Validate_Barcode_AdapterAbstract |
---|
34 | { |
---|
35 | /** |
---|
36 | * Allowed barcode lengths |
---|
37 | * @var integer |
---|
38 | */ |
---|
39 | protected $_length = array(8, 13); |
---|
40 | |
---|
41 | /** |
---|
42 | * Allowed barcode characters |
---|
43 | * @var string |
---|
44 | */ |
---|
45 | protected $_characters = '0123456789X'; |
---|
46 | |
---|
47 | /** |
---|
48 | * Checksum function |
---|
49 | * @var string |
---|
50 | */ |
---|
51 | protected $_checksum = '_gtin'; |
---|
52 | |
---|
53 | /** |
---|
54 | * Allows X on length of 8 chars |
---|
55 | * |
---|
56 | * @param string $value The barcode to check for allowed characters |
---|
57 | * @return boolean |
---|
58 | */ |
---|
59 | public function checkChars($value) |
---|
60 | { |
---|
61 | if (strlen($value) != 8) { |
---|
62 | if (strpos($value, 'X') !== false) { |
---|
63 | return false; |
---|
64 | } |
---|
65 | } |
---|
66 | |
---|
67 | return parent::checkChars($value); |
---|
68 | } |
---|
69 | |
---|
70 | /** |
---|
71 | * Validates the checksum |
---|
72 | * |
---|
73 | * @param string $value The barcode to check the checksum for |
---|
74 | * @return boolean |
---|
75 | */ |
---|
76 | public function checksum($value) |
---|
77 | { |
---|
78 | if (strlen($value) == 8) { |
---|
79 | $this->_checksum = '_issn'; |
---|
80 | } else { |
---|
81 | $this->_checksum = '_gtin'; |
---|
82 | } |
---|
83 | |
---|
84 | return parent::checksum($value); |
---|
85 | } |
---|
86 | |
---|
87 | /** |
---|
88 | * Validates the checksum () |
---|
89 | * ISSN implementation (reversed mod11) |
---|
90 | * |
---|
91 | * @param string $value The barcode to validate |
---|
92 | * @return boolean |
---|
93 | */ |
---|
94 | protected function _issn($value) |
---|
95 | { |
---|
96 | $checksum = substr($value, -1, 1); |
---|
97 | $values = str_split(substr($value, 0, -1)); |
---|
98 | $check = 0; |
---|
99 | $multi = 8; |
---|
100 | foreach($values as $token) { |
---|
101 | if ($token == 'X') { |
---|
102 | $token = 10; |
---|
103 | } |
---|
104 | |
---|
105 | $check += ($token * $multi); |
---|
106 | --$multi; |
---|
107 | } |
---|
108 | |
---|
109 | $check %= 11; |
---|
110 | $check = 11 - $check; |
---|
111 | if ($check == $checksum) { |
---|
112 | return true; |
---|
113 | } else if (($check == 10) && ($checksum == 'X')) { |
---|
114 | return true; |
---|
115 | } |
---|
116 | |
---|
117 | return false; |
---|
118 | } |
---|
119 | } |
---|