source: trunk/xgraph/jpgraph/Examples/qrexample02.php

<?php
    // Example 2 : QR Barcode with specified version

    // Include the library
    require_once ('jpgraph/QR/qrencoder.inc.php');

    // Data to be encoded
    $data = '01234567';
    $version = 4;  // Use QR version 4

    // Create a new instance of the encoder and let the library
    // decide a suitable error level
    $encoder = new QREncoder($version);

    // Use the image backend
    $backend = QRCodeBackendFactory::Create($encoder, BACKEND_IMAGE);

    // Set the module size (quite big)
    $backend->SetModuleWidth(5);

    // .. send the barcode back to the browser for the data
    $backend->Stroke($data);
?>