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119 lines
2.9 KiB
PHP
119 lines
2.9 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Validate
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* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* @see Zend_Validate_Barcode_AdapterAbstract
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*/
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/**
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* @category Zend
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* @package Zend_Validate
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* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Validate_Barcode_Issn extends Zend_Validate_Barcode_AdapterAbstract
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{
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/**
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* Allowed barcode lengths
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* @var integer
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*/
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protected $_length = array(8, 13);
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/**
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* Allowed barcode characters
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* @var string
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*/
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protected $_characters = '0123456789X';
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/**
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* Checksum function
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* @var string
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*/
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protected $_checksum = '_gtin';
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/**
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* Allows X on length of 8 chars
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*
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* @param string $value The barcode to check for allowed characters
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* @return boolean
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*/
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public function checkChars($value)
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{
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if (strlen($value) != 8) {
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if (strpos($value, 'X') !== false) {
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return false;
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}
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}
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return parent::checkChars($value);
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}
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/**
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* Validates the checksum
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*
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* @param string $value The barcode to check the checksum for
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* @return boolean
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*/
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public function checksum($value)
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{
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if (strlen($value) == 8) {
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$this->_checksum = '_issn';
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} else {
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$this->_checksum = '_gtin';
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}
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return parent::checksum($value);
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}
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/**
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* Validates the checksum ()
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* ISSN implementation (reversed mod11)
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*
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* @param string $value The barcode to validate
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* @return boolean
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*/
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protected function _issn($value)
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{
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$checksum = substr($value, -1, 1);
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$values = str_split(substr($value, 0, -1));
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$check = 0;
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$multi = 8;
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foreach($values as $token) {
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if ($token == 'X') {
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$token = 10;
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}
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$check += ($token * $multi);
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--$multi;
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}
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$check %= 11;
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$check = 11 - $check;
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if ($check == $checksum) {
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return true;
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} else if (($check == 10) && ($checksum == 'X')) {
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return true;
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}
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return false;
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}
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}
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