mod-11 is a PSR-2-compliant library for calculating Mod11 checksums as used by the Royal Mail, USPS and others.
You can easily install this library by running the following command if you're using composer.
composer require samlittler/mod-11
Alternatively, you can download it and manually include it.
Usage is really simple too.
<?php
use \Mod11\Mod11;
$checksum = Mod11::calculate($test_value, $weights);
Testing on 4 working strings from different sources. It works :)
1.1.1
- Dependency on PHP 7.1 specified. This always existed, but now it's explicit.
1.1.0
- Removed dependency on phpunit. Now only a dev dependency
- Added a .gitignore
- Made PSR-2 compliant
1.0.0
- Initial commit with working tests