NAME

CheckDigits::M10_006 - compute check digits for Rentenversicherung (DE)

SYNOPSIS

  use Algorithm::CheckDigits;

  $rv = CheckDigits('rentenversicherung');

  if ($rv->is_valid('65180539W001')) {
        # do something
  }

  $cn = $rv->complete('65180539W00');
  # $cn = '65180539W001'

  $cd = $rv->checkdigit('65180539W001');
  # $cd = '1'

  $bn = $rv->basenumber('65180539W001');
  # $bn = '65180539W00'

DESCRIPTION

ALGORITHM

1.: The letter is replaced with a two-figure number appropriate to the position of the letter in the german alphabet.
2.: Beginning left all numbers are weighted with 2,1,2,5,7,1,2,1,2,1,2,1.
3.: The the total of the digits of all products is computed.
4.: The check digit is sum from step 3 taken modulo 10.

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>"