我想在PHP中使用不同的页面类型生成PDF

I am using dompdf for generating PDF files (data comes from database).

    $dompdf = new DOMPDF();
    $dompdf->load_html($strHtml); // here $strHtml is the containt which I want to write in pdf
    $dompdf->set_paper( array(0,0, 12 * 108, 12 * 72), "portrait" ); // 12" x 12"

    $dompdf->render();

    // The next call will store the entire PDF as a string in $pdf

    $pdf = $dompdf->output();

    // You can now write $pdf to disk, store it in a database or stream it
    // to the client.

    $pdfname = 'PDFNAME'
    file_put_contents('pdf/'.$pdfname.'.pdf', $pdf);

Right now in $strHtml variable there are many pages for PDF, and all pages generated with page type portait.

Now I want to create all pages with different type for example page 1 with portrait, 2nd page with landscape, 3 with landscape etc.

How can I solve this problem?