Facebook makes heavy use of HTML, JavaScript, CSS in the Frontend and in the Backend there is PHP!??

Well…… not only but also 😀

HipHop for PHP is a source code transformer for PHP script code and was created to save server resources. HipHop transforms PHP source code into optimized C++. After doing this, it uses g++ to compile it to machine code.

Firebug addon to Firefox makes it very visual what is what and what Facebook uses for doing what. Dissecting the code-mess.

Debugging Facebook

WOW! Proving that php and apache can handle massively-large scale applications.

But not only read here: http://www.makeuseof.com/tag/facebook-work-nuts-bolts-technology-explained/

The development of facebook brought forth open source technologies: https://developers.facebook.com/opensource/

CNN VIDEO: http://cnn.com/video/?/video/world/2011/02/16/lake.facebook.revolution.cnn