KoolChart - Excellent PHP Chart and GraphKoolChart - Excellent PHP Chart and GraphFullVersion 2.6.0.3 released on 05/19/2017

ChartTypes - PHP Stacked Chart

* Note:Generate your own chart with Code Generator

Description & Sample code

Description Example.php Documentation 
To make a column or bar series stacked, you do:

    $series->Stacked = TRUE;//default = FALSE