<?php
    // Example 4 : QR Barcode with specified version and error correction level

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

    // Data to be encoded
    $data      = '01234567';
    $version   = 12;  // Use QR version 4
    $corrlevel = QRCapacity::ErrH ; // Level H error correction (the highest possible)

    // Create a new instance of the encoder using the specified
    // QR version and error correction
    $encoder = new QREncoder($version, $corrlevel);

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

    // Set the module size
    $backend->SetModuleWidth(3);

    // Store the barcode in the specifed file
    $backend->Stroke($data);
