| protected getChecksumDigit ( string $value ) : integer | ||
| $value | string | 12 digit CNP |
| return | integer | checksum digit |
protected function getChecksumDigit($value)
{
$checkNumber = 279146358279;
$checksum = 0;
foreach (range(0, 11) as $digit) {
$checksum += (int) substr($value, $digit, 1) * (int) substr($checkNumber, $digit, 1);
}
$checksum = $checksum % 11;
return $checksum == 10 ? 1 : $checksum;
}