Show HN: Validate GTIN (Barcode) 8s, 12s, 13s, and 14s in JavaScript or PHP #1 Post by Narutu » Thu, Mar 17, 2016, 8:05 PM UTC Show HN: Validate GTIN (Barcode) 8s, 12s, 13s, and 14s in JavaScript or PHPgithub.com