25.6. A template to create barcodes
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## 25.6. A template to create barcodes

In the example directory in the distribution ('`pdf417/examples`') you can find many more examples on how to create barcodes. As a good start the following (simple) template may be used as a base for further customizations.

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    <?php
    require_once('jpgraph/pdf417/jpgraph_pdf417.php');

    $data = 'PDF-417';

    // Specification for barcode

    $columns = 8;   // Use 8 data (payload) columns
    $errlevel = 4;  // Use error level 4
    $modwidth = 2;  // Setup module width (in pixels)
    $height = 2;    // Height factor (=2)
    $truncated = false; // Don't truncate
    $showtext = false;  // Show human readable string

    // Create a new encoder and backend to generate images
    try {
        $encoder = new PDF417Barcode($columns,$errlevel);
        $encoder->SetTruncated ($truncated);
        $backend = PDF417BackendFactory::Create(BACKEND_IMAGE,$encoder);
        $backend->SetModuleWidth($modwidth);
        $backend->SetHeight($height);
        $backend->NoText(!$showtext);
        $backend->Stroke($data);
    }
    catch(JpGraphException $e) {
        echo 'PDF417 Error: '.$e->GetMessage();
    }
    ?>

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