Hello friends, good evening, I have a case. I am working on a document processing system with a digital signature and since several PDFs are attached to the file, in the end I need to join them to print it in a single file and where I use merger where the pdf joins me normally, but the signatures they lose the pdf, I have seen this page https://www.ilovepdf.com/es/unir_pdf that joins normal with all signatures although the pdf loses the validity of the signature, that does not interest me because I only need to print it, there will be a bookstore or to do something similar to that page.
include 'PDFMerger.php';
use PDFMerger\PDFMerger;
$pdf = new PDFMerger;
$pdf->addPDF('file1.pdf');
$pdf->addPDF('file3.pdf');
$pdf->merge('download','merged.pdf');