8398c9048d
code was modified slightly, so the code differs from the original downloadable 1.9.5 version
110 lines
3 KiB
PHP
110 lines
3 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Zend Framework
|
|
*
|
|
* LICENSE
|
|
*
|
|
* This source file is subject to the new BSD license that is bundled
|
|
* with this package in the file LICENSE.txt.
|
|
* It is also available through the world-wide-web at this URL:
|
|
* http://framework.zend.com/license/new-bsd
|
|
* If you did not receive a copy of the license and are unable to
|
|
* obtain it through the world-wide-web, please send an email
|
|
* to license@zend.com so we can send you a copy immediately.
|
|
*
|
|
* @category Zend
|
|
* @package Zend_Validate
|
|
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
* @version $Id: Ean13.php 16223 2009-06-21 20:04:53Z thomas $
|
|
*/
|
|
|
|
|
|
/**
|
|
* @see Zend_Validate_Abstract
|
|
*/
|
|
require_once 'Zend/Validate/Abstract.php';
|
|
|
|
|
|
/**
|
|
* @category Zend
|
|
* @package Zend_Validate
|
|
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
*/
|
|
class Zend_Validate_Barcode_Ean13 extends Zend_Validate_Abstract
|
|
{
|
|
/**
|
|
* Validation failure message key for when the value is
|
|
* an invalid barcode
|
|
*/
|
|
const INVALID = 'invalid';
|
|
|
|
/**
|
|
* Validation failure message key for when the value is
|
|
* not 13 characters long
|
|
*/
|
|
const INVALID_LENGTH = 'invalidLength';
|
|
|
|
/**
|
|
* Validation failure message key for when the value
|
|
* does not only contain numeric characters
|
|
*/
|
|
const NOT_NUMERIC = 'ean13NotNumeric';
|
|
|
|
/**
|
|
* Validation failure message template definitions
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $_messageTemplates = array(
|
|
self::INVALID => "'%value%' is an invalid EAN-13 barcode",
|
|
self::INVALID_LENGTH => "'%value%' should be 13 characters",
|
|
self::NOT_NUMERIC => "'%value%' should contain only numeric characters",
|
|
);
|
|
|
|
/**
|
|
* Defined by Zend_Validate_Interface
|
|
*
|
|
* Returns true if and only if $value contains a valid barcode
|
|
*
|
|
* @param string $value
|
|
* @return boolean
|
|
*/
|
|
public function isValid($value)
|
|
{
|
|
if (!is_string($value) || !ctype_digit($value)) {
|
|
$this->_error(self::NOT_NUMERIC);
|
|
return false;
|
|
}
|
|
|
|
$this->_setValue($value);
|
|
if (strlen($value) !== 13) {
|
|
$this->_error(self::INVALID_LENGTH);
|
|
return false;
|
|
}
|
|
|
|
$barcode = strrev(substr($value, 0, -1));
|
|
$oddSum = 0;
|
|
$evenSum = 0;
|
|
|
|
for ($i = 0; $i < 12; $i++) {
|
|
if ($i % 2 === 0) {
|
|
$oddSum += $barcode[$i] * 3;
|
|
} elseif ($i % 2 === 1) {
|
|
$evenSum += $barcode[$i];
|
|
}
|
|
}
|
|
|
|
$calculation = ($oddSum + $evenSum) % 10;
|
|
$checksum = ($calculation === 0) ? 0 : 10 - $calculation;
|
|
|
|
if ($value[12] != $checksum) {
|
|
$this->_error(self::INVALID);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|