PHP serial port data transfer

Dear all

I have visited the following site
http://www.phpclasses.org/browse/package/3679.html

That class provides a connection for php to send/receive data via a serial COM port
And I’ve downloaded the class file and the example file, and test run it on IIS …

but i have no idea on how to find out the code is working or not …
and people can help me ??

Thanks
sam