PHP Graphing Tools

PHP can output data as tables any way out want, but how good is it at charting? Well, there's support for drawing with the GD extension, or you can create reasonable bar charts in HTML.

Some resources:

• JpGraph is an Object-Oriented Graph creating library, written purely in PHP and utilising either GD1 or GD2. It seems to have a wealth of charting capabilities.
• If you want to go it alone, or just find out more about how charts go together, have a look at Jason Sweat's article on Developing Professional Quality Graphs with PHP.