Comunications Port Accsess

Hi Guys, I devloped a general purpose output board from the serial port. This will allow me to do anything I wanted to do. My idea was If i could code it in a website based languages I could control the interface any where! I am unning a 2k advance server running on wundows with apache 2 and php latest. I am running mySQL also. There is 20gigs of space 128mB of memory. Just fought giveing you the specs might help. I wanted to know if there was any way I can control the serial port from php? I have looked at a few sites and looked in all my books but there dosent seem to be anything documented. Thanks, Adam