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Algorithm::CheckDigits::MXX_003.3pm
Langue: en
Version: 2010-07-01 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
CheckDigits::MXX_003 - compute check digits for DEMSYNOPSIS
use Algorithm::CheckDigits; $dem = CheckDigits('dem'); if ($dem->is_valid('GD0645027K1')) { # do something } $cn = $dem->complete('GD0645027K'); # $cn = 'GD0645027K1' $cd = $dem->checkdigit('GD0645027K1'); # $cd = '1' $bn = $dem->basenumber('GD0645027K1'); # $bn = 'GD0645027K'
DESCRIPTION
ALGORITHM
The algorithm is a variation of the Verhoeff scheme.- 0
- All letters are changed to numbers.
- 1
- All digits are permutated according to a permutation table.
- 2
- The permutated digits are combined using a diA~Xder table. The first with the second, the result with the third, this result with the fourth and so on.
- 3
- The result of the last combination in the diA~Xder table is in such a way combined that the result is 0 (zero). The number used for this combination is the checksum.
For details look at the source.
METHODS
- is_valid($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>THANKS
SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de,Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre