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Algorithm::CheckDigits::M07_001.3pm
Langue: en
Version: 2008-05-17 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
CheckDigits::M07_001 - compute check digits modulo 7 method 1SYNOPSIS
use Algorithm::CheckDigits; $m001 = CheckDigits('m001'); if ($m001->is_valid('1234567892')) { # do something } $cn = $m001->complete('123456789'); # $cn = '1234567892' $cd = $m001->checkdigit('1234567892'); # $cd = '2' $bn = $m001->basenumber('1234567892'); # $bn = '123456789'
DESCRIPTION
ALGORITHM
- 1.
- All digits are added.
- 2.
- All digits at even positions are added.
- 3.
- The sum of step 1 and 2 is taken modulo 7.
- 4.
- This is the check digit.
METHODS
- is_valid($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 undef if $number does not consist solely of digits.
- basenumber($number)
- Returns the basenumber of $number if $number has a valid check digit.
Return undef otherwise.
- checkdigit($number)
- Returns the check digit belonging to $number or undef if $number does not consist solely of digits.
EXPORT
None by default.AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>SEE ALSO
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