34vl.org -- run PHP code on 200 different versions

I just discovered this site today

https://3v4l.org

I know that sounded spammy and looks like spam. But I promise you it is 
not.
This is the front page's declaration:

3v4l.org is an online shell that allows you to run your PHP code on my 
server. I compiled more than 200 different PHP versions (every version 
released since 4.3.0) plus HHVM for you to use. For every script you 
submit, this site tells you:

  * Output from all released PHP and HHVM versions
  * Performance (time and memory) of every version
  * VLD <http://derickrethans.nl/projects.html#vld>opcode output
  * Contextual links to documentation and php sourcecode
  * Output from all upcoming alpha, beta & release-candidates
  * Output from a few popular RFC Branches
  * HHVM Bytecode output