How to merge two pdf in single pdf

Question

I have two different pdf files, named diff-1.pdf and diff-2.pdf and a single pdf named common.pdf.

Now I want to merge the contents of common.pdf to diff-1.pdf and generate a new file named first.pdf.

After that I want to merge the contents of common.pdf to diff-2.pdf and generate a new file named second.pdf.

I am using the pdfmerger library. I have used following code:

  <?pdf
       include 'PDFMerger.php';
       $pdf = new PDFMerger;

       <!-- Merge 'common.pdf' and 'diff-1.pdf' -->
       $pdf->addPDF('commonpdf/common.pdf', 'all');
       $pdf->addPDF('allpdf/diff-1.pdf', 'all');
       $pdf->merge('file', 'pdftest/first.pdf');

       <!-- Merge 'common.pdf' and 'diff-2.pdf' -->
       $pdf->addPDF('commonpdf/common.pdf', 'all');
       $pdf->addPDF('allpdf/diff-2.pdf', 'all');
       $pdf->merge('file', 'pdftest/second.pdf');
   ?>

but problem is arising that this code is generating only first.pdf at once. But I want to generate two pdf files in a single execution of this code. What should I do for this purpose?

Could you add the docs link to PDFMerger into your question, so people can check the docs if they wish? — halfer

Jan Slabon Jan Slabon · Accepted Answer · 2014-09-22T09:23:51

You have to initate a 2nd instance of PDFMerger after the first merger() call.

Anyhow, you should avoid using the PDFMerger class at all, because it uses a 5 (!!) years old version of FPDI! Just check this demo for a simple example showing you how to concatenate documents with FPDI.

How to merge two pdf in single pdf

1 Answers