3 ms·Thing to note: Facebook is written in PHP. I laugh so hard.by kajecounterhack 18y agoThing to note: Facebook is written in PHP. I laugh so hard.albertsun 18y agoOnly the presentation layer is written in PHP. The rest is written in something else.arockwell 18y agoSo is Wikipedia, Yahoo and countless other sites. What's your point?known 18y agoDigg is also written in PHP