datamatrix_ex1.php

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

    $data = '123456';

    $encoder = DatamatrixFactory::Create();
    $backend = DatamatrixBackendFactory::Create($encoder);
    $backend->SetModuleWidth(3);

    // 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";
    }

    ?>