datamatrix_ex4.php

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    <?php
    require_once('jpgraph/datamatrix/datamatrix.inc.php');

    $data = 'This is a 64x64 datamatrix symbol';

    // Create and set parameters for the encoder
    $encoder = DatamatrixFactory::Create(DMAT_64x64);
    $encoder->SetEncoding(ENCODING_TEXT);

    // Create the image backend (default)
    $backend = DatamatrixBackendFactory::Create($encoder);
    $backend->SetModuleWidth(3);

    // Adjust the Quiet zone
    $backend->SetQuietZone(10);

    // Create the barcode from the given data string and write to output file
    try {
        $backend->Stroke($data);
    } catch (Exception $e) {
        $errstr = $e->GetMessage();
        echo "Datamatrix error message: $errstr\n";
    }

    ?>