NAME

CheckDigits::M23_001 - compute check digits for DNI (ES)

SYNOPSIS

  use Algorithm::CheckDigits;

  $dni = CheckDigits('dni_es');

  if ($dni->is_valid('54362315K')) {
        # do something
  }

  $cn = $dni->complete('54362315');
  # $cn = '54362315K'

  $cd = $dni->checkdigit('54362315K');
  # $cd = 'K'

  $bn = $dni->basenumber('54362315K');
  # $bn = '54362315'

DESCRIPTION

ALGORITHM

1.: The checkdigit is the whole number taken modulo 23 and coded according to a keytable.

METHODS

is_valid($number): Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above.
Returns false otherwise,
complete($number): The check digit for $number is computed and concatenated to the end of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.
basenumber($number): Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
checkdigit($number): Returns the checkdigit of $number if $number has a valid check digit.
Return '' otherwise.

EXPORT

None by default.

AUTHOR

Mathias Weidner, "<mamawe@cpan.org>"