MPDF在当前页面上打印上一页和下一页

Question

如何在pdf的当前页面上打印上一页和下一页？

$mpdf->AddPage('P');
$mpdf->SetHTMLHeader('Continued from {PAGENO}'); // this should print the previous pagenum
$mpdf->SetHTMLFooter('Proceed to {PAGENO}'); //this should print the next pagenum