cc_validation.php

Easy_Buy是一个在线销售系统

<?php
/**
 * cc_validation Class.
 *
 * @package classes
 * @copyright Copyright 2003-2005 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: cc_validation.php 3041 2006-02-15 21:56:45Z wilt $
 */
if (!defined('IS_ADMIN_FLAG')) {
  die('Illegal Access');
}
/**
 * cc_validation Class.
 * Class to validate credit card numbers etc
 *
 * @package classes
 */
class cc_validation extends base {
  var $cc_type, $cc_number, $cc_expiry_month, $cc_expiry_year;

  function validate($number, $expiry_m, $expiry_y) {
    $this->cc_number = ereg_replace('[^0-9]', '', $number);

    if (ereg('^4[0-9]{12}([0-9]{3})?$', $this->cc_number) and CC_ENABLED_VISA=='1') {
      $this->cc_type = 'Visa';
    } elseif (ereg('^5[1-5][0-9]{14}$', $this->cc_number) and CC_ENABLED_MC=='1') {
      $this->cc_type = 'Master Card';
    } elseif (ereg('^3[47][0-9]{13}$', $this->cc_number) and CC_ENABLED_AMEX=='1') {
      $this->cc_type = 'American Express';
    } elseif (ereg('^3(0[0-5]|[68][0-9])[0-9]{11}$', $this->cc_number) and CC_ENABLED_DINERS_CLUB=='1') {
      $this->cc_type = 'Diners Club';
    } elseif (ereg('^6011[0-9]{12}$', $this->cc_number) and CC_ENABLED_DISCOVER=='1') {
      $this->cc_type = 'Discover';
    } elseif (ereg('^(3[0-9]{4}|2131|1800)[0-9]{11}$', $this->cc_number) and CC_ENABLED_JCB=='1') {
      $this->cc_type = 'JCB';
    } elseif (ereg('^5610[0-9]{12}$', $this->cc_number) and CC_ENABLED_AUSTRALIAN_BANKCARD=='1') {
      $this->cc_type = 'Australian BankCard';
    } else {
      return -1;
    }

    if (is_numeric($expiry_m) && ($expiry_m > 0) && ($expiry_m < 13)) {
      $this->cc_expiry_month = $expiry_m;
    } else {
      return -2;
    }

    $current_year = date('Y');
    $expiry_y = substr($current_year, 0, 2) . $expiry_y;
    if (is_numeric($expiry_y) && ($expiry_y >= $current_year) && ($expiry_y <= ($current_year + 10))) {
      $this->cc_expiry_year = $expiry_y;
    } else {
      return -3;
    }

    if ($expiry_y == $current_year) {
      if ($expiry_m < date('n')) {
        return -4;
      }
    }

    return $this->is_valid();
  }

  function is_valid() {
    $cardNumber = strrev($this->cc_number);
    $numSum = 0;

    for ($i=0; $i<strlen($cardNumber); $i++) {
      $currentNum = substr($cardNumber, $i, 1);

      // Double every second digit
      if ($i % 2 == 1) {
        $currentNum *= 2;
      }

      // Add digits of 2-digit numbers together
      if ($currentNum > 9) {
        $firstNum = $currentNum % 10;
        $secondNum = ($currentNum - $firstNum) / 10;
        $currentNum = $firstNum + $secondNum;
      }

      $numSum += $currentNum;
    }

    // If the total has no remainder it's OK
    return ($numSum % 10 == 0);
  }
}
?>