On PHPMaster.com today there's a new post highlighting the use of pChart to graph out the data from your PHP application. pChart provides an easy interface to draw graphs with GD, supporting alpha transparency, shadowing, spline/cubic curves and much more.

Created and maintained by Jean-Damien Pogolotti, a systems engineer based in Toulouse, France, pChart is a library that creates anti-aliased charts and graphs using PHP. It's object-oriented code has been recently redesigned and makes it easy to add beautiful, eye-catching data. The library is free for non-profit use and for inclusion in GPL distributed software; licensing plans for other uses start at just 50 Euro. In this article I'll take you through installing pChart and using it to generate a basic chart, line chart and plot graph.

He walks you through the download and installation of the tool as well as showing the code you'll need to include to get started with a first script. Their examples show how to create both single- and three-series charts with some sample data and some screenshots of output.