Why does Facebook use PHP instead of ASP.NET MVC? [closed]

Question

In every comparison between these two languages, ASP is recommended for "serious" web projects, so why does Facebook use PHP? PHP can't hold persistent database connections and in case of Facebook, I think this would slow down the application. Or am I wrong?

For example: Speed of code execution: ASP.NET-MVC versus PHP

I found that they use PHP because Mark Zuckerberg developed the first version of Facebook in PHP and a change would cost to much afford and money. But assumed Facebook started today, would it be intelligent to use ASP.NET instead of PHP?

Answer 1

As far as I know, The creators of facebook knew PHP and not ASP.NET, but I could be wrong here.

Answer 2

Because the original version of Facebook was an open source project.

Facebook project was one of Mark Zuckerberg's university assignments, and he had to do it with an open source project.

Except asp.net, other web programming languages are hard to learn or not fast enough.

If you compare PHP with other web programming languages (as I said except asp.net) it's more reasonable.

And as you said if he want to switch to Asp.net it have a lot of cost for Facebook.