CheckDigits::M11_007 - compute check digits for VAT Registration Number (FI)
use Algorithm::CheckDigits; $ustid = CheckDigits('ustid_fi'); if ($ustid->is_valid('13669598')) { # do something } $cn = $ustid->complete('1366959'); # $cn = '13669598' $cd = $ustid->checkdigit('13669598'); # $cd = '8' $bn = $ustid->basenumber('13669598'); # $bn = '1366959';
Beginning left every digit is weighted with 7,9,10,5,8,4,2.
The weighted digits are added.
The sum from step 2 is taken modulo 11.
The checkdigit is 11 minus the sum from step 3. Is the difference 10, the number won't be taken. If the difference is 11, the checkdigit is 0.
Returns true only if $number consists solely of digits and the rightmost digit is a valid check digit according to the algorithm given above.
$number
Returns false otherwise,
The check digit for $number is computed and appended to the end of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits.
Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
Returns the check digits of $number if $number has valid check digits.
None by default.
Mathias Weidner, <mamawe@cpan.org>
<mamawe@cpan.org>
perl, CheckDigits, http://www.pruefziffernberechnung.de/U/USt-IdNr.shtml#PZFI (german)
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.