Rechercher une page de manuel
Algorithm::CheckDigits::M11_009.3pm
Langue: en
Version: 2009-11-20 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
CheckDigits::M11_009 - compute check digits NRIC (SG)SYNOPSIS
use Algorithm::CheckDigits; $nric = CheckDigits('nric_sg'); if ($nric->is_valid('S1234567D')) { # do something } $cn = $nric->complete('S1234567'); # $cn = 'S1234567D' $cd = $nric->checkdigit('S1234567D'); # $cd = 'D' $bn = $nric->basenumber('S1234567D'); # $bn = 'S1234567';
DESCRIPTION
ALGORITHM
- 1.
- Beginning left every digit is weighted with 2, 7, 6, 5, 4, 3, 2
- 2.
- The weighted digits are added.
- 3.
- The sum from step 2 is taken modulo 11.
- 4.
- The checkdigit is 11 minus the sum from step 3 converted to a character according to the following table:
@cd = ('','A','B','C','D','E','F','G','H','I','Z','J', );
METHODS
- is_valid($number)
- Returns true only if $number consists of seven digits (optional preceded by a letter out of 'F', 'G', 'S', 'T') followed by a valid letter according to the algorithm given above.
Returns false otherwise,
- complete($number)
- The check letter for $number is computed and appended to the end of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits and letters.
- basenumber($number)
- Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
- checkdigit($number)
- Returns '' if $number is valid.
Return undef otherwise.
EXPORT
None by default.AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de,Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre