PHP Graphs With GD Library

PHP, with the help of the GD Graphics Library, can dynamically generate graphs and charts from data sets and databases. A relatively simple PHP script can be written to gather data statistics from the database, define the graph size and intervals, and plot line or bar graphs onto a PNG image. The image is created dynamically server-side and then displayed to the end user on page load. This tutorial on making graphs with the GD Library from Tech Republic was extremely informative, well written, and easy to follow.