With the growing use of continuous integration and static analysis tools hooked into those processes, there is a particular analysis tool that is very useful but rarely mentioned: phploc, the PHP Lines of Code tool. This has been a feature of PHPUnit for some time but has been released as a separate project in the phpunit pear channel. The nature of PHPUnit means that many of these statistics can be collected while the tests are running, which is why it was added to that tool in the first instance.
