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)
docs.dhtmlx.com/scheduler/data_formats.html
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.