This package can be used to merge (some pages of) PDF files into one PDF using the QPDF library.

composer require webstack/qpdf

Combine two PDF files into one

<?php

use Webstack\QPDF\QPDF;

require('vendor/autoload.php');

QPDF::createInstance()
  ->addFile('input-1.pdf')
  ->addFile('input-2.pdf')
  ->write('output.pdf');

Combine two PDF files into, specifying which pages to use

<?php

use Webstack\QPDF\QPDF;

require('vendor/autoload.php');

QPDF::createInstance()
  ->addPages('input-1.pdf', '1-3')
  ->addPages('input-2.pdf', '4,5')
  ->write('output.pdf');

Returns the output instead of writing it to a file

<?php

use Webstack\QPDF\QPDF;

require('vendor/autoload.php');

QPDF::createInstance()
  ->addFile('input-1.pdf')
  ->addFile('input-2.pdf')
  ->output();

Returns the number of pages in a file

<?php

use Webstack\QPDF\QPDF;

require('vendor/autoload.php');

QPDF::createInstance()->getNumberOfPages('input-1.pdf');

To run the tests use the following command

vendor/bin/phpunit --bootstrap vendor/autoload.php tests

This package utilizes the QPDF library and must be installed on te system.

QPDF is a command-line program that does structural, content-preserving transformations on PDF files. It could have been called something like pdf-to-pdf. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.

Ubuntu

sudo apt-get install -y qpdf

MacOS (using homebrew)

brew install qpdf