เพิ่มส่วนหัวไปยัง PDF ผ่าน PHP

    // Open document
    $document = new Document($inputFile);
    
    // Create footer
    $imageStamp = new ImageStamp($inputImage);
    $horizontalAlignment = new HorizontalAlignment();
    $verticalAlignment = new VerticalAlignment();

    // Set properties of the stamp
    $imageStamp->setTopMargin(10);
    $imageStamp->setHorizontalAlignment($horizontalAlignment->Center);
    $imageStamp->setVerticalAlignment($verticalAlignment->Top);

    $pages = $document->getPages();

    // Add footer to 1st page
    $page = $pages->get_Item(1);
    $page->addStamp($imageStamp);

    // Save output document
    $document->save($outputFile);
    $document->close();