1 files changed, 111 insertions, 0 deletions
diff --git a/lib/Zend/Validate/Ccnum.php b/lib/Zend/Validate/Ccnum.php
new file mode 100644
index 0000000..227a4ec
--- /dev/null
+++ b/lib/Zend/Validate/Ccnum.php
@@ -0,0 +1,111 @@
+<?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) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Ccnum.php 8064 2008-02-16 10:58:39Z thomas $
+ */
+
+
+/**
+ * @see Zend_Validate_Abstract
+ */
+require_once 'Zend/Validate/Abstract.php';
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Validate
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Validate_Ccnum extends Zend_Validate_Abstract
+{
+    /**
+     * Validation failure message key for when the value is not of valid length
+     */
+    const LENGTH   = 'ccnumLength';
+
+    /**
+     * Validation failure message key for when the value fails the mod-10 checksum
+     */
+    const CHECKSUM = 'ccnumChecksum';
+
+    /**
+     * Digits filter for input
+     *
+     * @var Zend_Filter_Digits
+     */
+    protected static $_filter = null;
+
+    /**
+     * Validation failure message template definitions
+     *
+     * @var array
+     */
+    protected $_messageTemplates = array(
+        self::LENGTH   => "'%value%' must contain between 13 and 19 digits",
+        self::CHECKSUM => "Luhn algorithm (mod-10 checksum) failed on '%value%'"
+    );
+
+    /**
+     * Defined by Zend_Validate_Interface
+     *
+     * Returns true if and only if $value follows the Luhn algorithm (mod-10 checksum)
+     *
+     * @param  string $value
+     * @return boolean
+     */
+    public function isValid($value)
+    {
+        $this->_setValue($value);
+
+        if (null === self::$_filter) {
+            /**
+             * @see Zend_Filter_Digits
+             */
+            require_once 'Zend/Filter/Digits.php';
+            self::$_filter = new Zend_Filter_Digits();
+        }
+
+        $valueFiltered = self::$_filter->filter($value);
+
+        $length = strlen($valueFiltered);
+
+        if ($length < 13 || $length > 19) {
+            $this->_error(self::LENGTH);
+            return false;
+        }
+
+        $sum    = 0;
+        $weight = 2;
+
+        for ($i = $length - 2; $i >= 0; $i--) {
+            $digit = $weight * $valueFiltered[$i];
+            $sum += floor($digit / 10) + $digit % 10;
+            $weight = $weight % 2 + 1;
+        }
+
+        if ((10 - $sum % 10) % 10 != $valueFiltered[$length - 1]) {
+            $this->_error(self::CHECKSUM, $valueFiltered);
+            return false;
+        }
+
+        return true;
+    }
+
+}