wurin7i
/ damm_check_digit.php
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March 1, 2020 15:44
Damm validation & generation code in PHP.Damm algorithm is a check digit algorithm that detects all single-digit errors and all adjacent transposition errors.
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| <?php | |
| /** | |
| * The Damm check digit | |
| * For more information cf. http://en.wikipedia.org/wiki/Damm_algorithm | |
| * totally anti-symmetric quasigroup | |
| * | |
| * @author Wuri Nugrahadi <w.nugrahadi@gmail.com> | |
| */ | |
| if (! function_exists('taq')) | |
| { |