HLP:How to make new Series,set their property in Excel files Chat with PHP code?

[rocsoar]

in php,when i new a excel file, and add a worksheet, add a chart on it,then i want to custom my own series, i must change the series' name,series' datasource dynamic.
so how can i reach it?

P.S; i found these code will not work,why?
$chartje->hastitle = true;
$chartje->charttitle->Text = "daaa";

thanks a lot.