如何将PHP变量从一个文件传递到另一个文件多次？

I have a highstock graph in a file called charts.php that reloads the graph data from a secondary file called data.php. Seeing as I have 5 series in my highstock graph I have to call the data.php file 5 times, each time using a different variable, but when I set the variable in my charts.php file it only uses the last set value of this variable. Is is possible to solve this, or is this just the way PHP works? Do I have to create 5 separate data.php files in order for this to work?I have a highstock graph in a file called chart