CheckDigits::M11_002 - compute check digits for PZN (DE)
use Algorithm::CheckDigits; $pzn = CheckDigits('pzn'); if ($pzn->is_valid('4877800')) { # do something } $cn = $pzn->complete('487780'); # $cn = '4877800' $cd = $pzn->checkdigit('4877800'); # $cd = '0' $bn = $pzn->basenumber('4877800'); # $bn = '487780'
From left to right beginning with the first position all digits are multiplied with 2,3,4,...
The sum of all products is computed.
The checkdigit ist the sum of step 2 taken modulo 11.
If the checkdigit is '10' the whole number is not taken as a PZN.
Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above.
$number
Returns false otherwise,
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.
Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
Returns the checkdigit of $number if $number has a valid check digit.
None by default.
Mathias Weidner, <mamawe@cpan.org>
<mamawe@cpan.org>
perl, CheckDigits, www.pruefziffernberechnung.de.
To install Algorithm::CheckDigits, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Algorithm::CheckDigits
CPAN shell
perl -MCPAN -e shell install Algorithm::CheckDigits
For more information on module installation, please visit the detailed CPAN module installation guide.