table of contents
| Algorithm::CheckDigits::M11_002(3) | User Contributed Perl Documentation | Algorithm::CheckDigits::M11_002(3) |
NAME¶
CheckDigits::M11_002 - compute check digits for PZN (DE)
SYNOPSIS¶
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');
# $bn = '487780'
DESCRIPTION¶
ALGORITHM¶
- 1.
- From left to right beginning with the first position all digits are multiplied with 2,3,4,...
- 2.
- The sum of all products is computed.
- 3.
- The checkdigit ist the sum of step 2 taken modulo 11.
- 4.
- If the checkdigit is '10' the whole number is not taken as a PZN.
METHODS¶
- is_valid($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, "<mamawe@cpan.org>"
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de.
| 2021-11-17 | perl v5.26.1 |