Do you need support for PDF documents with a version higher than 1.4? Check out the new FPDI PDF-Parser!
FPDI is a collection of PHP classes facilitating developers to read pages from existing PDF documents and use them as templates in FPDF, which was developed by Olivier Plathey. Apart from a copy of FPDF, FPDI does not require any special PHP extensions.
As of version 1.2.1 FPDI can also be used with TCPDF.
FPDI is developed by Setasign - Jan Slabon - and is published under the Apache Software License, Version 2.0.
The usage is very easy: open the document, put a page into a template, and use it like an image!