The Codeception testing tool has released a new major update with some interesting new features - the expected feature for generating code coverage reports (similar to other tools) but there's also the idea of "remote code coverage" introduced.
There is no magic in local codecoverage. XDebug and PHP_CodeCoverage libraries do their job. The tricky thing is remote codecoverage. We attach small script into application's front controller. When a special header is sent this script starts to collect coverage information. And in the end of tests, this data is merged, serialized and sent back to Codeception. So you can test and collect coverage report even on staging servers in real environment.
They also mention a few other updates in the release - new Redis and MongoDb modules, UX improvements and the normal bugfixes. You can find out more about the code coverage feature in their manual or just about the project in general from the main site.