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: Ccnum.php 20096 2010-01-06 02:05:09Z bkarwin $

    20  */

    21 

    22 /**

    23  * @see Zend_Validate_Abstract

    24  */

    25 require_once 'Zend/Validate/Abstract.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_Ccnum extends Zend_Validate_Abstract

    34 {

    35     /**

    36      * Validation failure message key for when the value is not of valid length

    37      */

    38     const LENGTH   = 'ccnumLength';

    39 

    40     /**

    41      * Validation failure message key for when the value fails the mod-10 checksum

    42      */

    43     const CHECKSUM = 'ccnumChecksum';

    44 

    45     /**

    46      * Digits filter for input

    47      *

    48      * @var Zend_Filter_Digits

    49      */

    50     protected static $_filter = null;

    51 

    52     /**

    53      * Validation failure message template definitions

    54      *

    55      * @var array

    56      */

    57     protected $_messageTemplates = array(

    58         self::LENGTH   => "'%value%' must contain between 13 and 19 digits",

    59         self::CHECKSUM => "Luhn algorithm (mod-10 checksum) failed on '%value%'"

    60     );

    61 

    62     public function __construct()

    63     {

    64         trigger_error('Using the Ccnum validator is deprecated in favor of the CreditCard validator');

    65     }

    66 

    67     /**

    68      * Defined by Zend_Validate_Interface

    69      *

    70      * Returns true if and only if $value follows the Luhn algorithm (mod-10 checksum)

    71      *

    72      * @param  string $value

    73      * @return boolean

    74      */

    75     public function isValid($value)

    76     {

    77         $this->_setValue($value);

    78 

    79         if (null === self::$_filter) {

    80             /**

    81              * @see Zend_Filter_Digits

    82              */

    83             require_once 'Zend/Filter/Digits.php';

    84             self::$_filter = new Zend_Filter_Digits();

    85         }

    86 

    87         $valueFiltered = self::$_filter->filter($value);

    88 

    89         $length = strlen($valueFiltered);

    90 

    91         if ($length < 13 || $length > 19) {

    92             $this->_error(self::LENGTH);

    93             return false;

    94         }

    95 

    96         $sum    = 0;

    97         $weight = 2;

    98 

    99         for ($i = $length - 2; $i >= 0; $i--) {

   100             $digit = $weight * $valueFiltered[$i];

   101             $sum += floor($digit / 10) + $digit % 10;

   102             $weight = $weight % 2 + 1;

   103         }

   104 

   105         if ((10 - $sum % 10) % 10 != $valueFiltered[$length - 1]) {

   106             $this->_error(self::CHECKSUM, $valueFiltered);

   107             return false;

   108         }

   109 

   110         return true;

   111     }

   112 }