<?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);
  ?>