CheckDigits::M97_002(3User Contributed Perl DocumentatiCheckDigits::M97_002(3)NAMECheckDigits::M97_002 - compute check digits for International Bank
Account Number (IBAN)
SYNOPSIS
use Algorithm::CheckDigits;
$iban = CheckDigits('iban');
if ($iban->is_valid('DE88 2008 0000 09703 7570 0')) {
# do something
}
$cn = $iban->complete('DE00 2008 0000 09703 7570 0');
# $cn = 'DE88 2008 0000 09703 7570 0'
$cd = $iban->checkdigit('DE88 2008 0000 09703 7570 0');
# $cd = '88'
$bn = $iban->basenumber('DE88 2008 0000 09703 7570 0');
# $bn = 'DE00 2008 0000 09703 7570 0'
DESCRIPTION
ALGORITHM
0 The IBAN number must be prepared. The first two letters and the
checksum will be moved to the right end. The letters are
substituted according to the substitute table and the checksum is
set to '00'.
1 The whole number is taken modulo 97.
2 The checksum is difference between 98 and the sum of step 2.
3 If the checksum is smaller then 10, a leading zero will be
prepended.
METHODS
is_valid($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>
THANKS
Detlef Pilzecker pointed out to me that there may be more letters as
the first two in an IBAN number. He also made me aware of a faster
method to compute the check number than using Math::BigInt.
SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de,
www.sic.ch/en/tkicch_home/tkicch_standardization/tkicch_financialinstitutions_ibanipi.htm.
perl v5.14.1 2009-11-20 CheckDigits::M97_002(3)