How To Change Credit Card Validation Rules

[scottdev]

I want to change the credit card number format that the system will accept as being a valid credit card - beginning numbers of 9000 xxxx xxx with only 12 digits. My client has a private label payment card we will process manually.

 

Is there a file or setting I can change?

[scottdev]

OK - Found the file I believe I need to change. Basically, I want to add a new "type" of credit card that begins with "9999" and has only 12 digits.

 

Any takers?

 

 

 

 

 

<?php

/*

$Id: cc_validation.php,v 1.1.1.1 2003/09/18 19:05:13 wilt Exp $

 

osCommerce, Open Source E-Commerce Solutions

http://www.oscommerce.com

 

Copyright © 2003 osCommerce

 

Released under the GNU General Public License

*/

 

class cc_validation {

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)) {

$this->cc_type = 'Visa';

} elseif (ereg('^5[1-5][0-9]{14}$', $this->cc_number)) {

$this->cc_type = 'Master Card';

} elseif (ereg('^3[47][0-9]{13}$', $this->cc_number)) {

$this->cc_type = 'American Express';

} elseif (ereg('^3(0[0-5]|[68][0-9])[0-9]{11}$', $this->cc_number)) {

$this->cc_type = 'Diners Club';

} elseif (ereg('^6011[0-9]{12}$', $this->cc_number)) {

$this->cc_type = 'Discover';

} elseif (ereg('^(3[0-9]{4}|2131|1800)[0-9]{11}$', $this->cc_number)) {

$this->cc_type = 'JCB';

} elseif (ereg('^5610[0-9]{12}$', $this->cc_number)) {

$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);

}

}

?>