How to find out which version of Silverstripe a site is using, looking at the source code?

Question

I have been given a Silverstripe site to maintain. How do I know which version of Silverstripe it's using, by looking in the source code?

Answer 1

If your SS installation was made through composer you can have a look to composer.json in the root directory.

If it's a 3.x.x version you can also leave the mouse on the SS logo in backend (upper left corner) and the anchor title wil show you the version. Maybe it works also for 2.x.x versions, but I'm not sure.