How can I edit pdf files using php mpdf so that the inscriptions made by another editor do not disappear?

Question

PHP

Good afternoon, there was a problem with editing with mpdf. There is a pdf file that was labeled with Foxit Reader, but they disappear when you try to edit this pdf

$path = 'file.pdf';
$mpdf = new \Mpdf\Mpdf(['format' => 'A4', 'orientation' => 'P', 'default_font' => 'arial']);
$mpdf->SetSourceFile($path);
$tplId = $mpdf->ImportPage(1);
$mpdf->UseTemplate($tplId);
$mpdf->Output(str_replace(['.pdf'], ['_sign.pdf'], $path), 'F');

How can this problem be solved?

Answer 1

It is worth looking at this file with another program - maybe Foxit sculpts something of its own there, not according to the standard. At least open it in a browser, they now know how to do it.
Well, what about Arial - does mPDF have it at all? This is not Windows, there is nothing like it out of the box. It's more like DejaVuSans or FreeSans.