Merge PDF

Personal project fork of the original hanneskod/libmergepdf PHP library for merging multiple PDFs. Use at your own risk.

Installation

composer require benjivm/merge-pdf

Usage

Append the first ten pages of bar.pdf to foo.pdf:

use Benjivm\MergePdf\Merger;
use Benjivm\MergePdf\Pages;

$merger = new Merger;
$merger->addFile('foo.pdf');
$merger->addFile('bar.pdf', new Pages('1-10'));
$createdPdf = $merger->merge();

Bulk add files from an iterator:

use Benjivm\MergePdf\Merger;

$merger = new Merger;
$merger->addIterator(['A.pdf', 'B.pdf']);
$createdPdf = $merger->merge();

Merging pdfs of version 1.5 and later

The default FPDI driver is not able handle compressed pdfs of version 1.5 or later. Circumvent this limitation by using the slightly more experimental TCPDI driver.

use Benjivm\MergePdf\Merger;
use Benjivm\MergePdf\Driver\TcpdiDriver;

$merger = new Merger(new TcpdiDriver);

Using an immutable merger

Immutability may be achieved by using a driver directly.

use Benjivm\MergePdf\Driver\Fpdi2Driver;
use Benjivm\MergePdf\Source\FileSource;
use Benjivm\MergePdf\Pages;

$merger = new Fpdi2Driver;

$createdPdf = $merger->merge(
    new FileSource('foo.pdf'),
    new FileSource('bar.pdf', new Pages('1-10'))
);

Known issues

• Links and other content outside a page content stream is removed at merge. This is due to limitations in FPDI and not possible to resolve with the current strategy. For more information see FPDI.
• TCPDI (as used in the TcpdiDriver for merging pdfs with newer features) does not seem to be maintained. This makes mergeing fragile for certain kinds of files, and error messages are often all but helpful. This package will not be able to fix issues in TCPDI. The long term solution is to switch to a different backend. Suggestions are very welcomed!