source: trunk/xgraph/jpgraph/Examples/qrexample09.php

<?php
    // Example 9 : QR Barcode with data read from file and different colors

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

    $readFromFilename = 'qr-input.txt';

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

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

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

    // Use blue and white colors instead
    $backend->SetColor('navy','white');

    // .. send the barcode back to the browser for the data in the file
    $backend->StrokeFromFile($readFromFilename);
?>