JpGraph is a fully OO (Object-Oriented) Graph creating class library for PHP >= 4.3.0. The library can be used to create numerous types of graphs on-line. JpGraph makes it easy to draw both "quick and dirty" graphs with a minimum of code as well as complex graphs which requires a very fine grained control. The library assigns context sensitive default values for most of the parameters which minimizes the learning curve. The features are there when you need it - they don't get in your way!