Sparkline PHP Graphing Library is a PHP Library that generate Sparkline(obviously). It says to have these features:

* Flexible - While Sparkline is not a general-purpose graphing library, we do provide a wide range of options how your graphs are rendered. Version 0.1 supports line and bar modes, which allow for simple line, filled line, bar, and whisker graphs.
* Elegant - It's important that sparklines are visually appealing, especially in the restricted visual environment of the web. Web sparklines should approach as closely as possible the aesthetic of printed sparklines.
* Free - Sparkline is completely free to use on your personal website, company home page, or to include in your commercial product. Sparkline is distributed under the BSD license.

Here is a example of what it can do:

Editor Comment:

When I'm finding programs about image, I always find a server version and client version, which is jspark.