table of contents
| Algorithm::CheckDigits::M11_008(3pm) | User Contributed Perl Documentation | Algorithm::CheckDigits::M11_008(3pm) |
NAME¶
CheckDigits::M11_008 - compute check digits for VAT Registration Number (DK)
SYNOPSIS¶
use Algorithm::CheckDigits;
$ustid = CheckDigits('ustid_dk');
if ($ustid->is_valid('13585628')) {
# do something
}
$cn = $ustid->complete('1358562');
# $cn = '13585628'
$cd = $ustid->checkdigit('13585628');
# $cd = '8'
$bn = $ustid->basenumber('13585628');
# $bn = '1358562';
DESCRIPTION¶
ALGORITHM¶
- 1.
- Beginning left every digit is weighted with 2, 7, 6, 5, 4, 3, 2, 1
- 2.
- The weighted digits are added.
- 3.
- The sum from step 2 is taken modulo 11.
- 4.
- The number is valid if the sum from step 3 is zero (0).
METHODS¶
- is_valid($number)
- Returns true only if $number consists solely of
numbers and the sum computed according to the algorithm given above is 0.
Returns false otherwise,
- complete($number)
- Returns $number if $number
is valid according to the algorithm given above.
Return '' otherwise.
- basenumber($number)
- Returns $number if $number
is valid according to the algorithm given above.
Return '' otherwise.
- checkdigit($number)
- Returns '' if $number is valid.
Return undef otherwise.
EXPORT¶
None by default.
AUTHOR¶
Mathias Weidner, "<mamawe@cpan.org>"
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de,
| 2021-11-17 | perl v5.40.0 |