TUTORIAL CATEGORIES
PHP: Hypertext Preprocessor tutorials. If you have never used PHP before, PHP runs "Server Side" (struts it's stuff on the server before sending a webpage to the client) your best resource is php.net.
JavaScript tutorials. JavaScript runs "Client Side" (On the users machine). This means it has has no access to the Server - but you can load other pages using AJAX and Server side code (such as PHP) to achieve some stunning user interfaces (UI) and functionality.
XAMPP Tutorials. XAMPP is software that can run on modern windows machines and turn them into a servers. It is a great tool for developing on. It consists of Apache, PHP, MySQL amongst other software. There are also versions available for Linux, Mac & Solaris.