CheckDigits::M10_011 − compute check digits UPS (US)
use Algorithm::CheckDigits; $ups = CheckDigits('ups'); if ($ups−>is_valid('1Z 591580 68 55587736')) { # do something } $cn = $ups−>complete('1Z 591580 68 5558773'); # $cn = '1Z 591580 68 55587736' $cd = $ups−>checkdigit('1Z 591580 68 55587736'); # $cd = '6' $bn = $ups−>basenumber('1Z 591580 68 55587736'); # $bn = '1Z 591580 68 5558773'
ALGORITHM
1. |
Beginning left all numbers are weighted alternatively 1 and 2. |
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2. |
The sum of all products is computed. |
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3. |
The sum of step 3 ist taken modulo 10. |
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4. |
The check digit is the difference between 10 and the number from step 3. |
METHODS
is_valid($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.
Mathias Weidner, <mathias AT weidner DOT in−bad−schmiedeberg.de>
perl, CheckDigits, www.pruefziffernberechnung.de.