qrexample09.php
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<?php // content="text/plain; charset=utf-8"
    // Example 9 : QR Barcode with data read from file and different colors
 
    // Include the library
    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);
?>