Algorithm::CheckDigits::M23_001(3)

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>"

SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de.