We've put together some URLs to help you in your adventure with PHP. You'll find some excellent tutorial and reference sites, the PHP software itself and other supporting software, and a list of PHP editors. *
PHP Installation Resources
Wikipedia's List of PHP Editors
If you haven't already, consider downloading an editor with syntax highlighting. It's much easier than working from Notepad. Wikipedia lists editors for Windows, Mac, and Linux, both freeware and commercial.
* These are sites we have used and found genuinely helpful. We are sharing these as a service to our visitors, unknown to the webmasters of these sites.