NAME¶
CheckDigits::M89_001 - compute check digits for VAT Registration Number (LU)
SYNOPSIS¶
use Algorithm::CheckDigits;
$ustid = CheckDigits('ustid_lu');
if ($ustid->is_valid('13669580')) {
# do something
}
$cn = $ustid->complete('136695');
# $cn = '13669580'
$cd = $ustid->checkdigit('13669580');
# $cd = '80'
$bn = $ustid->basenumber('13669580');
# $bn = '136695'
DESCRIPTION¶
ALGORITHM¶
- 1.
- The checksum is the whole number taken modulo 89.
METHODS¶
- is_valid($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,
www.pruefziffernberechnung.de.