function commerce_payment_validate_credit_card_issue in Commerce Core 7

Validates that an issue number is numeric if present.

1 call to commerce_payment_validate_credit_card_issue()

commerce_payment_credit_card_validate in modules/payment/includes/commerce_payment.credit_card.inc

Validates a set of credit card details entered via the credit card form.

File

modules/payment/includes/commerce_payment.credit_card.inc, line 368

Credit-card helper functions for Drupal commerce.

Code

function commerce_payment_validate_credit_card_issue($issue) {
  if (empty($issue) || is_numeric($issue) && $issue > 0) {
    return TRUE;
  }
  return FALSE;
}