qrexample04.php

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    <?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);
    ?>