BadBlue - http://badblue.com - is a free web server for Windows that has been especially designed to work with PHP. Its integrated PHP Wizard makes steps you through download and installation of PHP in (literally) seconds.
New version 2.4.2 adds several requested features:
o Remote administration: you can now designate one or more users as "Remote Administrators"; these users can now use the Manage tab from any location. See the Manage, Define Users option for instructions. Remote administrators can control virtual directories, manage users, control access, and do almost anything a local administrator can do.
o New PHP help pages are available at http://badblue.com/helpphp.htm (updated for PHP 5).
o Default folder control: select which tab visitors see first (Folders or Search). See the Manage, Set preferences... option for instructions.
o Several thumbnail image (automatic photo album views in virtual directories) improvements have been made
Download new, free BadBlue 2.4.2 at http://badblue.com/down.htm - it's probably the easiest way to get PHP going on a Windows PC. It's tiny, fast, easy and free!