Make sure your program can run on different PHP setups by distributing a custom environment setup. Expalins how to create the config and how to get your current configuration.
This will allow you to create a script so when you click a link on a page it will direct you to the link and count up how many times it has been clicked.
Ever logged onto Yahoo! or here on Planet Source Code and have run across the verification image containing numbers and leters that you must plug into a form for verification? Learn to do it.
This tutorial is intended for the PHP programmer who needs to incorporate PDF generation in a script without using external libraries such as PDFlib (often unavailable due to licensing restrictions or lack of funds).