Algorithm::CheckDigits::M10_006(3pm)

Usage

  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'

Overview

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.

Releases

9 releases since Debian 5.0 (Lenny); the text changed 3 times.