Libchart is a free chart creation PHP library, that is easy to use.
Here are some key features of "Libchart":
· Bar charts (horizontal or vertical).
· Line charts.
· Pie charts.
· Compatibility with PHP 4 / PHP 5.
· No external dependency, need only PHP compiled with GD and FreeType
· PHP (Version 4 branch)
What's New in This Release:
· The ability to set the upper/lower bounds (regression) was added.
· In HorizontalBarChart, a small box is shown when x = 0 (regression).
· In multiple series charts, colors are now re-used when the maximum series count is exceeded.
· In the multiple series bar chart, the brown color is shown twice.
· In pie chart when some relative percentage is null, the whole diagram is filled in by one color.
· The ability to use negative values in bar charts was added.