| Algorithm::CheckDigits::MXX_001(3pm) | User Contributed Perl Documentation | Algorithm::CheckDigits::MXX_001(3pm) |
NAME¶
CheckDigits::MXX_001 - compute check digits for german Personalausweis (pa_de) or ABA routing numbers (aba_rn)
SYNOPSIS¶
use Algorithm::CheckDigits;
$pa = CheckDigits('pa_de');
if ($pa->is_valid('2406055684D<<6810203<0705109<6')) {
# do something
}
if ($pa->is_valid('2406055684') {
# do_something
}
$cn = $pa->complete('240605568_D<<681020_<070510_<_');
# $cn = '2406055684D<<6810203<0705109<6'
$cd = $pa->checkdigit('2406055684D<<6810203<0705109<6');
# $cd = '6'
$bn = $pa->basenumber('2406055684D<<6810203<0705109<6');
# $bn = '240605568_D<<681020_<070510_<_'
$aba = CheckDigits('aba_rn');
if ($aba->is_valid('789456124')) {
# do something
}
DESCRIPTION¶
ALGORITHM¶
- 1.
- Beginning left all digits are weighted with 7,3,1,7,3,1,... for pa_de or 3,7,1,3,7,1,3,7,1 for aba_rn.
- 2.
- The sum of those products is computed.
- 3.
- For pa_de the checksum is the last digit of the sum from step 2
(modulo 10).
For aba_rn the checksum is the difference of the sum from step 2 to the next multiple of 10.
- 4.
- For the german Personalausweis step 1 to 3 is performed for every part of
the number and for all 3 parts including the particular checkdigit to
compute the total checksum.
If the number solely consists of digits, the checksum is just computed once according to algorithm given above.
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>"
THANKS¶
Aaron W. West pointed me to a fault in the computing of the check digit. Jim Hickstein made me aware of the ABA routing numbers.
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de, http://answers.google.com/answers/threadview/id/43619.html, http://www.brainjar.com/js/validation/
| 2021-11-17 | perl v5.40.0 |