What is SocialEngine?
SocialEngine is a PHP-based social network platform that lets you create a social network on your website. Right out of the box, your social network will offer nearly all of the features found on today's wildly popular social networks. Instead of hosting your social network on our servers, we give you complete control over your project by allowing you to download the source code and install it on your own server.

Antechinus PHP Editor lets you create, edit and run PHP scripts from the integrated environment.
Are you using Dreamweaver, Front Page, or another visual editor to design your web pages? If you are, you know how easy it is to put your pages together, and you might ask if there was any point in learning PHP.
Well, it depends... Visual editors are powerful, and if you add JavaScript to your pages you can make them very dynamic. However, PHP works at the server side to produce HTML on-the-fly and is easily combined with MySQL databases.
PHP is therefore a great choice for your shopping cart, chat, polls, form processing, guestbook, and other complex scripts. It works literally everywhere, so it is an ideal solution if you are after multi-platform browser-independent development.