qrexample09.php

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    <?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);
    ?>