NAME Business::HK::IdentityCard - validate identity card numbers used in Hong Kong VERSION version 1.000 SYNOPSIS use Business::HK::IdentityCard; my $hkid = Business::HK::IdentityCard->new('A123456(3)'); if ($hkid->is_valid()) { print $hkid->as_string() . " is valid\n"; } DESCRIPTION This module validates identity card numbers used in Hong Kong. See for further details on the format. METHODS new Accepts a scalar representing the ID. IDs look like A123456(3), ie an alphabetic prefix, siz digits and a check digit. The prefix can be one or two characters and the brackets are optional for the check digit. is_valid Returns true if the ID provided is a correct HK ID. This will confirm that the format is correct and the checksum is valid. as_string Returns the ID formatted as a string using the conventional format, ie upper-case letters and checksum in brackets. as_string_no_checksum Returns the ID formatted as a string without the checksum. As the checksum is not officially part of the ID, some systems may store IDs in this format. SOURCE AVAILABILITY Source code can be found on Github. Pull requests for bug fixes welcome. http://github.com/rupertl/business-hk-identitycard/tree/master THANKS Thanks to David Webb for advice on how the checksum for double prefix IDs should be calculated. AUTHOR Rupert Lane COPYRIGHT AND LICENSE This software is copyright (c) 2014 by Rupert Lane. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.