Since v 1.6.2.0 of Line and Column you can convert values into durations. For example, instead of “190 s” (190 seconds) you can have “03:10″ or “03m 10s” or similar. Scatter chart already supported this feature. More information on this topic can be found in the documentation.
PHP class Library
Good people from Fusonic created AmCharts-PHP Class Library and shared it with all of us.