[SOLVED] Merge multiple PDF files using PHP

Merge multiple PDF files using PHP

SCENARIO: On my web application, I have some PDF files that the user can pick to merge to create a single file with all the pages together.

EXPECTED RESULT: A single PDF file

How can I solve such a problem in PHP? Are there any libraries I could use to do so? Do I need to use some specific PHP framework, or some specific PHP version? Thanks in advance

Solution

I've done this before. I had a pdf that I generated with fpdf, and I needed to add on a variable amount of PDFs to it.

So I already had an fpdf object and page set up (http://www.fpdf.org/) And I used fpdi to import the files (http://www.setasign.de/products/pdf-php-solutions/fpdi/) FDPI is added by extending the PDF class:

class PDF extends FPDI
{

} 



    $pdffile = "Filename.pdf";
    $pagecount = $pdf->setSourceFile($pdffile);  
    for($i=0; $i<$pagecount; $i++){
        $pdf->AddPage();  
        $tplidx = $pdf->importPage($i+1, '/MediaBox');
        $pdf->useTemplate($tplidx, 10, 10, 200); 
    }

This basically makes each pdf into an image to put into your other pdf. It worked amazingly well for what I needed it for.