Ever wanted to generated PDF documents on the fly with PHP? Perhaps populate a standard contract with a customers name and address? FPDF and FPDI are two neat libraries which greatly helps when working with PDF files.

FPDF handles most of the work of creating and working with the PDF files while FPDI works together with it to pull in existing PDF files so FPDF can modify them. He links to some sample code you can try out once you've installed the two libraries.

An alternative way of generating PDF files with PHP is using FPDF, a free PHP class containing a number of functions for creating and manipulating PDFs. The key word here is free. You are free to download and use this class or customise it to fit your needs. In addition to being free, it's also simpler to use than PDFlib. The PDFlib needs to be installed as an extension in your PHP package, whereas FPDF can just be included in your PHP script and it's ready to use

They show how to use the FPDF library to make some simple files - setting the title, author, adding images and text, etc. There's even a little bit there at the end about adding new pages to make more complex documents simple.