The BadBlue people — who make the easy-to-use PHP web server for Windows — created a couple of interesting tutorials for PHP newbies.
Installing PHP and a server on your Windows PC – http://www.badblue.com/tuphp.htm
Writing your first PHP script – http://www.badblue.com/tuphp1.htm
These are pretty good because they’re illustrated and numbered. You can follow the steps, screen-shot by screen-shot, so even your Grandma should be able to get PHP running. All of the BadBlue tutorials are here: http://badblue.com/tutor.htm – they include the file-sharing and photo-album stuff their server is also known for.