PHP graphic software--JFreeChart

JFreeChart is a free Java class library for generating charts, including:

• pie charts (2D and 3D);
• bar charts (regular and stacked, with an optional 3D effect);
• line and area charts;
• scatter plots and bubble charts;
• time series, high/low/open/close charts and candle stick charts;
• combination charts;
• Pareto charts;
• Gantt charts;
• wind plots, meter charts and symbol charts;
• wafer map charts;

Other features offered by JFreeChart:

• complete source code is included, under the terms of the GNU Lesser General Public Licence;
• access to data from any source via dataset interfaces;
• support for multiple secondary axes and datasets;
• tooltips, zooming, printing;
• direct export to PNG and JPEG;
• export to PDF via iText and SVG via Batik (both described in the JFreeChart Developer Guide).
• support for servlets, JSP applets or client applications;
• comprehensive API docs generated by gjdoc or javadoc;