create new PDF using TCPDF and import existing PDF into it

Question

How can I import an existing pdf file into the new-created pdf using TCPDF?

So assume I am currently doing an invoice section. Once the user click print invoice, I will start gather the data and then create a PDF using TCPDF. However, I need to "attach" another existing PDF into it if available. So assume, in 1 invoice file that is generated from TCPDF consists of 5 pages. And then I have to "attach" another existing PDF into this file. So total will be 6 pages or more, depends on the existing PDF file. The existing PDF file is uploaded by the user. So, the existing PDF file will be uploaded first, then will be added into the new generated invoice file.

Is there any way to achieve it?

Answer 1

You can achieve this with the addition of FPDI:

<?php
require_once('tcpdf.php');
require_once('fpdi.php');

$pdf = new FPDI();

//Merging of the existing PDF pages to the final PDF
$pageCount = $pdf->setSourceFile('existing_pdf.pdf');
for ($i = 1; $i <= $pageCount; $i++) {
    $tplIdx = $pdf->importPage($i, '/MediaBox');
    $pdf->AddPage();
    $pdf->useTemplate($tplIdx);
}

//Your code relative to the invoice here

$pdf->Output();