qrexample01.php
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<?php
require_once ('jpgraph/QR/qrencoder.inc.php');
 
// Data to be encoded
$data = '01234567';
 
// Create a new instance of the encoder and let the library
// decide a suitable QR version and error level
$encoder = new QREncoder();
 
// Use the image backend
$backend = QRCodeBackendFactory::Create($encoder, BACKEND_IMAGE);
 
// Set the module size (quite big)
$backend->SetModuleWidth(5);
 
// .. send the barcode back to the browser for the data
$backend->Stroke($data);
?>