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Algorithm::CheckDigits::M11_017.3pm
Langue: en
Version: 2008-05-17 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
CheckDigits::M11_017 - compute check digits for EC-No, EINECS, ELINCSSYNOPSIS
use Algorithm::CheckDigits; $ecno = CheckDigits('ecno'); if ($ecno->is_valid('200-236-6')) { # do something } $cn = $ecno->complete('200-236-'); # $cn = '200-236-6' $cd = $ecno->checkdigit('200-236-6'); # $cd = '6' $bn = $ecno->basenumber('200-236-6'); # $bn = '200-236-'
DESCRIPTION
ALGORITHM
- 1.
- From left to right all digits are multiplied with their position in the sequence.
- 2.
- The sum of all products is computed.
- 3.
- The sum of step 2 is taken modulo 11.
The checkdigit is the last digit of the result.
METHODS
- is_valid($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>SEE ALSO
perl, CheckDigits, http://en.wikipedia.org/wiki/EC-No.Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre