I am working with the demo code supplied for the phpClient. In one of the sections I am retrieving all the items in the Calendar folder using the getItemsRequest method.

I am wondering how I would form a query to retrieve calendar items in a certain date range? I'd like to pass a start and end date and only retrieve calendar items that fall in between those dates. I looked through the PHP code and WSDL docs and don't see how to pass parameters to do something like that.

Also, I don't see much documentation inside the WSDL and PHP code. This is my first experience with WSDL, so I'm wondering if there is some way of understanding how the code works or another area of documentation that I am missing? I downloaded the phpClient which has the demo PHP code and WSDL documentation inside it.