php - FPDF error: This document (testcopy.pdf) probably uses a compression technique which is not supported by the free parser shipped with FPDI

Question

I am running the following code and giving me this error : FPDF error: This document (testcopy.pdf) probably uses a compression technique which is not supported by the free parser shipped with FPDI. I used another pdf named test.pdf and that works fine but it is giving me error in testcopy.pdf.

I think this is parser problem. Anyone know any other parser that can be used with fpdf to avoid this error?

My code:

require('fpdf17/fpdf.php'); 
require('fpdf17/fpdi.php'); 
// initiate FPDI 
$pdf = new FPDI(); 
while (ob_get_level())
ob_end_clean();
header("Content-Encoding: None", true);
// set the sourcefile 
$pagecount = $pdf->setSourceFile('testcopy.pdf');

I want to split pdf in two pdfs and want to attach both pdfs in file attachments field.How to save pdf to server. Can it be possible with fpdf?

Answer 1

Yes, Exactly the FPDF library supports only PDF version 1.4 & lesser. So to over come from this issue use GhostScript. This script helps to change the PDF versions dynamically.

(1) Download the Ghostscript here.

(2) Install the Ghostscript and define the environment variable PATH.

(3) Then, use the below php code to change the PDF version.

shell_exec( "gswin32 -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dNOPAUSE -dQUIET -dBATCH -sOutputFile=".$new_pdf." ".$old_pdf.""); 

(4) Now we get PDF with version 1.4 as output, then continue with FPDF.

Enjoy!