Numerik

Modern PHP 8.3+ library for validating and parsing Polish identification numbers — PESEL, NIP, REGON, KRS, NRB, VAT-EU, and IBAN. Rich value objects, detailed error reasons, zero production dependencies.

Installation

composer require slashlab/numerik

Quick Start

use SlashLab\Numerik\Numerik;

// Simple boolean check
Numerik::pesel()->isValid('92060512186');  // true
Numerik::nip()->isValid('5260250274');     // true

// Rich validation result with failure reasons
$result = Numerik::pesel()->validate('92060512186');
$result->isValid;                          // true

$result = Numerik::pesel()->validate('92060512185');  // wrong checksum digit
$result->isFailed();                       // true
$result->getFirstFailure()->reason;        // ValidationFailureReason::InvalidChecksum

// Parse to value object
$pesel = Numerik::pesel()->parse('92060512186');
$pesel->getBirthDate()->format('Y-m-d');  // '1992-06-05'
$pesel->getGender();                      // Gender::Female

Documentation

Full documentation at numerik.slashlab.pl

Laravel Integration

A dedicated Laravel package is available at slashlab/numerik-laravel (requires PHP 8.3+, Laravel 11/12/13). The service provider is auto-discovered — no manual registration needed.

composer require slashlab/numerik-laravel

Use class-based rules or plain strings — both styles work:

use SlashLab\NumerikLaravel\Rules\PeselRule;
use SlashLab\NumerikLaravel\Rules\NipRule;
use SlashLab\NumerikLaravel\Rules\RegonRule;
use SlashLab\NumerikLaravel\Rules\KrsRule;
use SlashLab\NumerikLaravel\Rules\NrbRule;
use SlashLab\NumerikLaravel\Rules\VatEuRule;
use SlashLab\NumerikLaravel\Rules\IbanRule;

// Class-based (supports options)
public function rules(): array
{
    return [
        'pesel'  => ['required', new PeselRule()],              // strict mode on by default
        // 'pesel'  => ['required', new PeselRule(strict: false)], // disable strict checks
        'nip'    => ['required', new NipRule()],
        'regon'  => ['required', new RegonRule()],
        'krs'    => ['required', new KrsRule()],
        'nrb'    => ['required', new NrbRule()],
        'vat_eu' => ['required', new VatEuRule()],
        'iban'   => ['required', new IbanRule()],
    ];
}

// String-based
public function rules(): array
{
    return [
        'pesel'  => ['required', 'pesel'],
        'nip'    => ['required', 'nip'],
        'regon'  => ['required', 'regon'],
        'krs'    => ['required', 'krs'],
        'nrb'    => ['required', 'nrb'],
        'vat_eu' => ['required', 'vat_eu'],
        'iban'   => ['required', 'iban'],
    ];
}

Class-based rules return a distinct message per failure reason (e.g. wrong checksum vs invalid length). Messages resolve the field label from validation.attributes when available, falling back to a humanised field name. The package ships with English and Polish translations — publish them with php artisan vendor:publish --tag=numerik-lang.

PeselRule also accepts gender, bornBefore, and bornAfter constraints for stricter identity checks. See the full Laravel documentation for details.

Changelog

See CHANGELOG.md.

Contributing

See CONTRIBUTING.md.

License

MIT — see LICENSE.

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