In this PDF primer we've explored how to create documents and pages inside them, add fonts of various size and colour, add and manipulate images, and finally how to add non-paginated information to the document. There is a fair amount more to working with PDF files than I have been able to cover here, however the core concepts are all above. There is an excellent forum online at http://groups.yahoo.com/group/pdflib where you can ask further questions about using PDFlib, and it is well worth a look if you intend on delving into more advanced areas.
Adding dynamically generated PDFs to your site can be a great boon, especially where official documents are concerned - it is definitely worth the pay-off to take the time to get PDF generation down to a fine art in order to add another valuable item to your PHP toolkit. Admittedly, there are still some limitations in the technology: the inability to load existing documents for editing is the one most commonly cited. However, that disadvantage is almost certainly outweighed by the sheer popularity of the format.