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<?php
/**
* @package Joomla
* @subpackage Membership Pro
* @author Tuan Pham Ngoc
* @copyright Copyright (C) 2012 - 2026 Ossolution Team
* @license GNU/GPL, see LICENSE.php
*/
defined('_JEXEC') or die;
class OSMembershipHelperCreditcard
{
/**
* Validate this credit card. If the card is invalid, InvalidArgumentException is thrown.
*
* This method is called internally by gateways to avoid wasting time with an API call
* when the credit card is clearly invalid.
*
* Generally if you want to validate the credit card yourself with custom error
* messages, you should use your framework's validation library, not this method.
*
* @return void
* @throws InvalidArgumentException
*/
public static function validateCard($cardNumber, $expMonth, $expYear)
{
if (static::getExpiryDate('Ym', $expMonth, $expYear) < gmdate('Ym'))
{
throw new InvalidArgumentException('Card has expired');
}
if (!static::validateLuhn($cardNumber))
{
throw new InvalidArgumentException('Card number is invalid');
}
if (!preg_match('/^\d{12,19}$/i', $cardNumber))
{
throw new InvalidArgumentException('Card number should have 12 to 19 digits');
}
}
/**
* Validate a card number according to the Luhn algorithm.
*
* @param string $number The card number to validate
*
* @return bool True if the supplied card number is valid
*/
protected static function validateLuhn($number)
{
$str = '';
foreach (array_reverse(str_split($number)) as $i => $c)
{
$str .= $i % 2 ? $c * 2 : $c;
}
return array_sum(str_split($str)) % 10 === 0;
}
/**
* Credit Card Type
*
* Iterates through known/supported card brands to determine the brand of this card
*
* @param string $cardNumber
*
* @return string
*/
public static function getCardType($cardNumber)
{
$supportedCardTypes = [
'visa' => '/^4\d{12}(\d{3})?$/',
'mastercard' => '/^(5[1-5]\d{4}|677189)\d{10}$/',
'discover' => '/^(6011|65\d{2}|64[4-9]\d)\d{12}|(62\d{14})$/',
'amex' => '/^3[47]\d{13}$/',
'diners_club' => '/^3(0[0-5]|[68]\d)\d{11}$/',
'jcb' => '/^35(28|29|[3-8]\d)\d{12}$/',
'switch' => '/^6759\d{12}(\d{2,3})?$/',
'solo' => '/^6767\d{12}(\d{2,3})?$/',
'dankort' => '/^5019\d{12}$/',
'maestro' => '/^(5[06-8]|6\d)\d{10,17}$/',
'forbrugsforeningen' => '/^600722\d{10}$/',
'laser' => '/^(6304|6706|6709|6771(?!89))\d{8}(\d{4}|\d{6,7})?$/',
];
foreach ($supportedCardTypes as $brand => $val)
{
if (preg_match($val, $cardNumber))
{
return $brand;
}
}
return '';
}
/**
* Get the card expiry date, using the specified date format string.
*
* @param string $format
* @param int $expMonth
* @param int $expYear
*
* @return string
*/
protected static function getExpiryDate($format, $expMonth, $expYear)
{
return gmdate($format, gmmktime(0, 0, 0, $expMonth, 1, $expYear));
}
}