Endroid QR Code

Tile helps you generate images containing a QR code.

<?php

$qrCode = new Endroid\QrCode\QrCode();
$qrCode->setText("Life is too short to be generating QR codes");
$qrCode->setSize(300);
$qrCode->render();

Symfony

You can use EndroidQrCodeBundle to enable this service in your Symfony application.