function commerce_cardonfile_format_credit_card_number in Commerce Card on File 7.2

Formats a truncated credit card number for display.

While most credit cards have 16 numbers, some like American Express have less. This function respects those rules in order to generate a more believable mask.

Parameters

$card_number: Truncated card number (last 4 digits).

$card_type: The card type.

Return value

The formatted credit card number with unknown numbers represented by an X. Thus a visa ending with "1234" gets formatted as "XXXX-XXXX-XXXX-1234".

2 calls to commerce_cardonfile_format_credit_card_number()

commerce_cardonfile_get_properties in ./commerce_cardonfile.module

Entity Metadata getter callback.

commerce_cardonfile_handler_field_card_number::get_value in includes/views/handlers/commerce_cardonfile_handler_field_card_number.inc

Return the entity object or a certain property of the entity.

File

./commerce_cardonfile.module, line 1011

Supports card on file functionality for credit card payment methods by associating card data reference IDs from payment gateways with user accounts.

Code

function commerce_cardonfile_format_credit_card_number($card_number, $card_type) {
  $special_lengths = array(
    'amex' => 15,
    'cb' => 14,
    'dc' => 14,
  );
  $length = isset($special_lengths[$card_type]) ? $special_lengths[$card_type] : 16;
  $padded_number = str_pad($card_number, $length, 'X', STR_PAD_LEFT);
  $new_number = chunk_split($padded_number, 4, '-');

  // chunk_split() returns an extra '-' at the end of the number, ignore it.
  return substr($new_number, 0, -1);
}