If anyone else has the same question, their FAQ says they use Prospector to generate the metrics. Prospector in turn appears to mainly use pylint.

Did I get it right, it's only available for GitHub users and only useable for GitHub-hosted repositories?

Hi, creator of the site here. Currently it is only useable for GitHub hosted repos and therefore GitHub users, but the plan is to extend this in the future. Step 1 is to iron out the bugs in general but private repos or arbitrary repo hosts will be added.

Now if you'll excuse me, I'm off to run around screaming while the server melts :)

I prefer using pylint in a pre-commit hook so that I can catch problems before pushing them.

You may therefore be intereseted in following https://github.com/landscapeio/prospector, which is the 'command line' version of Landscape. If you already have pylint setup and configured, then it's probably not useful to you, but for people who are starting out, it aims to be helpful straight away and to have sensible defaults rather than the onslaught that you usually receive the first time you run Pylint.

Well, pylint is indeed especially helpfull when it comes to the sanity of code..And yes it is a must before pushing changes

Does anyone know of any similar tools for a PHP code base?