datamatrix_ex0.php
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<?php
require_once('jpgraph/datamatrix/datamatrix.inc.php');
 
$data = 'The first datamatrix';
$encoder = DatamatrixFactory::Create();
$encoder->SetEncoding(ENCODING_ASCII);
$backend = DatamatrixBackendFactory::Create($encoder);
 
// We increase the module width to 3 pixels
$backend->SetModuleWidth(3);
 
try {
    $backend->Stroke($data);
} catch (Exception $e) {
    echo 'Datamatrix error: '.$e->GetMessage()."\n";
    exit(1);
}
?>