If you would like to contribute, thank you :)
Here are a few informations you need to know before starting:
Pull requests should be made against the master branch, which supports both PHP 7 and PHP 5.
Tests are in phpt file format in the tests directory.
Tests can be run by following compilation and installation procedure
and executing make test.
To run integration tests, make sure you have Kafka instance running.
Then, rename test_env.php.sample to test_env.php and adjust it
with values proper for your kafka instance.