CheckDigits::MBase_002 - compute check digits for blood bags (DE), BZÜ (DE), VAT Registration Number (DE)
use Algorithm::CheckDigits; $bb = CheckDigits('blutbeutel'); if ($bb->is_valid('2761011234567893')) { # do something } $cn = $bb->complete('276101123456789'); # $cn = '2761011234567893' $cd = $bb->checkdigit('2761011234567893'); # $cd = '3' $bn = $bb->basenumber('2761011234567893'); # $bn = '276101123456789';
Start with values P = 10, S = 0.
Beginning left you do the following for all digits
S = (P + digit) modulo 10
If S is 0 then S = 10.
P = (2 * S) modulo 11
The check digit is (11 - P) modulo 10.
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, www.eurocode.org.
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.