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Algorithm::CheckDigits::MXX_001.3pm
Langue: en
Version: 2008-05-17 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
CheckDigits::MXX_001 - compute check digits for PA (DE)SYNOPSIS
use Algorithm::CheckDigits; $pa = CheckDigits('pa_de'); if ($pa->is_valid('2406055684D<<6810203<0705109<6')) { # 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'); # $bn = '240605568_D<<681020_<070510_<_'
DESCRIPTION
ALGORITHM
- 1.
- Beginning left all digits are weighted with 7,3,1,7,3,1,...
- 2.
- The sum of those products is computed.
- 3.
- The checksum is the last digit of the sum from step 2 (modulo 10).
- 4.
- Step 1 to 3 is performed for every part of the number and for all 3 parts including the particular checkdigit to compute the total checksum.
METHODS
- is_valid($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
Aaron W. West pointed me to a fault in the computing of the check digit.SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de, www.export911.com/e911/coding/upcChar.htm, www.adams1.com/pub/russadam/upccode.html, http://www.upcdatabase.com.Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre