Does anyone know how to make Serial.php read serial data on Windows platforms?

[jeofva]

I'm attempting to write an AJAX/PHP script that will poll the serial port on my XP laptop with NMEA 0813 data fed from a GPS attached to the serial port.  I had planned to use the PHP_Serial class written by Rémy Sanchez

(http://www.phpclasses.org/browse/package/3679.html)

but, it appears that the Windows routine for reading data from the port has been left conspicuously unimplemented.  That, of course, is critical to the project, so I was wondering if anyone here might know how to fix it - or at least what the algorithm is for reading data from a serial port (once a link has been established), so I might take a stab at fixing it.