CheckDigits::MXX_004(3User Contributed Perl DocumentatiCheckDigits::MXX_004(3)NAME
CheckDigits::MXX_004 - compute check digits for VAT RN (AT)
SYNOPSIS
use Algorithm::CheckDigits;
$vat = CheckDigits('ustid_at');
if ($vat->is_valid('U13585627')) {
# do something
}
$cn = $vat->complete('U1358562');
# $cn = 'U13585627'
$cd = $vat->checkdigit('U13585627');
# $cd = '7'
$bn = $vat->basenumber('U13585627');
# $bn = 'U1358562'
DESCRIPTION
ALGORITHM
1. Beginning right all numbers before the check digit are weighted
alternatively 1 and 2.
2. The total of the digits of all products is computed and then
subtracted from 96.
3. The check digit is the sum of step 3 taken modulo 10.
METHODS
is_valid($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, <mathias@weidner.in-bad-schmiedeberg.de>
SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de.
perl v5.14.1 2009-11-20 CheckDigits::MXX_004(3)