private function validateCardNumber($card_number)
{
if (!$card_number) {
return false;
}
//check wrong symbol in number
if (!preg_match('/^[\\s\\d]*$/', $card_number)) {
return false;
}
//delete spaces
$card_number = preg_replace('/\\D/', '', $card_number);
//not empty
if ($card_number == '') {
return false;
}
//check length
if (strlen($card_number) > 20 || strlen($card_number) < 13) {
return false;
}
//luhn algoritm
$luhn = new Luhn();
if (!$luhn->check($card_number)) {
return false;
}
return true;
}
private static function validateIsbn13($isbn13)
{
if (strlen($isbn13) != 13 || !ctype_digit($isbn13)) {
return false;
}
return Luhn::check($isbn13, 13, false);
}
/**
* {@inheritdoc}
*/
public static function check($gtin, $length, $unDecorate = true, $hyphens = self::HYPHENS)
{
return parent::check($gtin, $length, true, $hyphens);
}