table of contents
| Algorithm::CheckDigits::M11_003(3pm) | User Contributed Perl Documentation | Algorithm::CheckDigits::M11_003(3pm) |
NAME¶
CheckDigits::M11_003 - compute check digits for PKZ (GDR)
SYNOPSIS¶
use Algorithm::CheckDigits;
$pkz = CheckDigits('pkz');
if ($pkz->is_valid('150765400354')) {
# do something
}
$cn = $pkz->complete('15076540035');
# $cn = '150765400354'
$cd = $pkz->checkdigit('150765400354');
# $cd = '4'
$bn = $pkz->basenumber('150765400354');
# $bn = '150765400354'
DESCRIPTION¶
ALGORITHM¶
- 1.
- The checkdigit is set to 0.
- 2.
- From right to left the digits are weighted (multiplied) with 2,4,8,5,10,9,7,3,6,1,2,4.
- 3.
- The products are added.
- 4.
- The sum of step 3 is taken modulo 11.
- 5.
- The value of step 4 is added to a multiple (0..9) of the weight of the checkdigit (2).
- 6.
- The sum of step 5 is taken modulo 11.
- 7.
- The checkdigit is the multiple of the weight of the checkdigit where the value of step 6 equals 10.
- 8.
- If there can't be reached a value of 10 in step 6, the number cannot be taken as a PKZ.
To validate a PKZ apply steps 2 to 4 to the complete number.
METHODS¶
- is_valid($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 v5.40.0 |