Codeigniter-highcharts-library is a project mainly written in PHP, it's free.
Highcharts library for codeigniter
Highcharts is a charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application. Highcharts currently supports line, spline, area, areaspline, column, bar, pie and scatter chart types.
Note: This library is still in early development stage. Any bug report and/or ideas/improvements are welcome.
Complete documentation will be available soon.
Features:
All first level highcharts options can be "set/push/unset", so if the API is improved, new methods will be available. Methods parameters should be arrays or object
ie :
$this->highcharts->set_global(array('useUTC' => false))
take a look to the source code for more informations
Highcharts - Interactive JavaScript charts for your web pages:
download highcharts
API reference