CheckDigits::M97_001(3User Contributed Perl DocumentatiCheckDigits::M97_001(3)NAME
CheckDigits::M97_001 - compute check digits for VAT Registration Number
(BE)
SYNOPSIS
use Algorithm::CheckDigits;
$ustid = CheckDigits('ustid_be');
if ($ustid->is_valid('136695962')) {
# do something
}
$cn = $ustid->complete('1366959');
# $cn = '136695962'
$cd = $ustid->checkdigit('136695962');
# $cd = '62'
$bn = $ustid->basenumber('136695962');
# $bn = '1366959'
DESCRIPTION
ALGORITHM
1. The whole number (without checksum) is taken modulo 97.
2. The checksum is difference of the remainder from step 1 to 97.
METHODS
is_valid($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 checkdigits 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, www.pruefziffernberechnung.de.
perl v5.14.1 2009-11-20 CheckDigits::M97_001(3)