david
28b02db2ea
git-svn-id: https://192.168.0.254/svn/Proyectos.Incam_SGD/tags/3.7.0.2_original@1 eb19766c-00d9-a042-a3a0-45cb8ec72764
102 lines
2.6 KiB
PHP
102 lines
2.6 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) 2005-2007 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: Ccnum.php 3278 2007-02-07 21:54:50Z darby $
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*/
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/**
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* @see Zend_Validate_Interface
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*/
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require_once 'Zend/Validate/Interface.php';
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/**
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* @see Zend_Filter_Digits
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*/
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require_once 'Zend/Filter/Digits.php';
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/**
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* @category Zend
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* @package Zend_Validate
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* @copyright Copyright (c) 2005-2007 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_Ccnum implements Zend_Validate_Interface
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{
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/**
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* Array of validation failure messages
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*
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* @var array
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*/
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protected $_messages = array();
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/**
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* Defined by Zend_Validate_Interface
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*
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* Returns true if and only if $value follows the Luhn algorithm (mod-10 checksum)
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*
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* @param string $value
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* @return boolean
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*/
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public function isValid($value)
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{
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$this->_messages = array();
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$filterDigits = new Zend_Filter_Digits();
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$valueFiltered = $filterDigits->filter($value);
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$length = strlen($valueFiltered);
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if ($length < 13 || $length > 19) {
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$this->_messages[] = "'$value' must contain between 13 and 19 digits";
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return false;
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}
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$sum = 0;
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$weight = 2;
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for ($i = $length - 2; $i >= 0; $i--) {
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$digit = $weight * $valueFiltered[$i];
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$sum += floor($digit / 10) + $digit % 10;
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$weight = $weight % 2 + 1;
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}
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if ((10 - $sum % 10) % 10 != $valueFiltered[$length - 1]) {
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$this->_messages[] = "Luhn algorithm (mod-10 checksum) failed on '$valueFiltered'";
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return false;
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}
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return true;
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}
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/**
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* Defined by Zend_Validate_Interface
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*
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* Returns array of validation failure messages
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*
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* @return array
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*/
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public function getMessages()
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{
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return $this->_messages;
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}
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}
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