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Pay By Square payload generator for PHP — the Slovak Banking Association's payment QR standard. Pure PHP ≥ 8.2: no extensions, no shell-outs, installs on any shared host.

Part of the paybysquare/php multi-language suite: the same contract is implemented in TypeScript (@paybysquare/core on npm) and served by a hosted/self-hostable HTTP API — all verified against one shared set of test vectors. Using Laravel? See paybysquare/laravel for a facade, config defaults, and a Blade QR component.

Install

composer require paybysquare/php

Usage

use PayBySquare\Payment;
use PayBySquare\PayBySquare;

$payload = PayBySquare::generatePayload(new Payment(
    amount: 25.50,
    iban: 'SK7283300000009111111118',
    beneficiaryName: 'Acme s.r.o.',
    swift: 'FIOZSKBAXXX',
    variableSymbol: '2026001',
    note: 'Invoice FA20260103',
));
// $payload is the string to put into a QR code

Array input works too (canonical camelCase keys):

$payload = PayBySquare::generatePayload([
    'amount' => 25.50,
    'iban' => 'SK7283300000009111111118',
    'beneficiaryName' => 'Acme s.r.o.',
]);

Render with any QR library, e.g. bacon/bacon-qr-code:

use BaconQrCode\Renderer\ImageRenderer;
use BaconQrCode\Renderer\Image\SvgImageBackEnd;
use BaconQrCode\Renderer\RendererStyle\RendererStyle;
use BaconQrCode\Writer;

$writer = new Writer(new ImageRenderer(new RendererStyle(256), new SvgImageBackEnd()));
$svg = $writer->writeString($payload);

Input

amount, iban and beneficiaryName are required; currency (default EUR), date (DateTimeInterface or YYYY-MM-DD, default today), swift, variableSymbol, constantSymbol, specificSymbol, note, beneficiaryAddress1/2 are optional. Invalid input throws PayBySquare\ValidationException with a public $field property. Amounts with more than 2 decimal places are rejected, not rounded.

Correctness

Every release passes the shared test vectors: payloads are decoded by an independent liblzma-based reference verifier and the recovered data must match the spec byte-for-byte. The emitted LZMA stream is literal-coded — roughly 10–20% longer than liblzma's output (at most one QR version larger; scannability is unaffected) — and decodable by any conforming LZMA decoder.

Trademark note

PAY by square is a payment standard of the Slovak Banking Association. This is an independent open-source implementation, not affiliated with or endorsed by the SBA or Bysquare.

paybysquare / php

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