events_rec php file modification

i want to make changes to events_Rec.php file and make it in class format like

class eventsrec
//code here

is it possible? if yes than how to call this file in scheduler.load(‘events_rec.php’) method

scheduler.load simply calls specified url and expects that the url will response with the data in correct format(xml, json, ics)
The inner implementation of the server side handler is up to you, as long as it works with the correct data format.

So load will work if i pass index.php?p=events&q=load where load is function written in events_rec.php file ?

Format of url doesn’t matter
Client side will call the url and parse the response as data xml ( data json )
You can have a file on server side which will init the necessary class, call its method and output the response.