README

This library is a set of static methods for GTIN validation.

The library is best suited for quick validation of many codes without instantiating a new object for each code. Simple true or false is returned and no additional details are provided on failure. Only trade product codes return true, codes with restricted or special use prefixes return false.

Supported codes

• GTIN-8 (former EAN-8)
• GTIN-12 (former UPC)
• GTIN-13 (former EAN-13)
• GTIN-14

Checks performed

• format
• check digit
• GS1 prefix

Implementation is based on GS1 General Specifications ver. 18, Jan 2018. Prefix list verified on 2 Jan 2026.

Installation

Via Composer

$ composer require pmigut/gtin-validator

Via Git

$ git clone git@github.com:pmigut/gtin-validator.git

Examples

Basic usage

<?php

use Pmigut\GtinValidator\Gtin8;

var_dump(Gtin8::isValid('12312312'));
// Output: false

Strict types

isValid method expects string argument. If strict_types=1 is declared, isValid may throw TypeError.

<?php
declare(strict_types=1);

use Pmigut\GtinValidator\Gtin8;

var_dump(Gtin8::isValid(12312312));
// Output: PHP Fatal error:  Uncaught TypeError: Argument 1 passed to
// Pmigut\GtinValidator\Gtin8::isValid() must be of the type string, integer given

Leading zeros

Codes are validated as is, no leading zeros are added.

<?php

use Pmigut\GtinValidator\Gtin13;

var_dump(Gtin13::isValid('0000906332847'));
// Output: true

var_dump(Gtin13::isValid('906332847'));
// Output: false

Testing

$ composer test

License

This library is licensed under the MIT License, see LICENSE for details.