For any projects where you might need a graphical representation of statistical data, we recommend pChart, an OOP PHP library for plotting graphs via a web server.
In this cases, the developer will gain more if he moves the charting technology to the server-side, freeing the client from another complex, time-consuming application.
This means a Ruby, Perl, Python or PHP-based charting solution. For the latter case, pChart is one of the tools to take into consideration, providing lots of options, chart types and rendering modes.
But nothing clears up doubt better than some examples. So download pChart and take a look at the large collection of demos and their respective documentation.
Download pChart from our Scripts section here.
Check out more pChart screenshots here.