Running php scripts under cygwin

I have a php script that I use for backup with rsync over ssh and those tools work great under cygwin. I'd like to use this same script that I use on my unix/linux servers. You would think I could find lots of info on this subject, but for some reason I can't. I found info from googling the subject and some mention of building php with cygwin, but do not see PHP in cygwin setup. I hope someone here has PHP running on cygwin and can perhaps point me to some information or suggest how I can get my php script to run under cygwin, hopefully via cron service. I am not sure if I need PHP in cygwin or can access the php.exe already installed under Windows? I tried to run a php script from a cygwin prompt using the php.exe installed into Windows, but get lots of module not found errors. Is it possible to run a php script under cygwin. -- Robert