There are a number of tools qa use to maintain quality.
Christian hosts continuous integration results
Before releasing a new version of PEAR, we need to make sure it runs on as many systems as possible. It's pretty easy:
pear upgrade -f PEAR pear upgrade XML_RPC cvs -d :pserver:cvsread@cvs.php.net:/repository checkout pear-core cd pear-core/tests && pear run-tests -r
Tell pear-qa@lists.php.net if you got failures, and if, which tests did not pass. We will come back to you in that case.
There are nightly unit test results published at http://lauken.com/doconnor/, you can find out more about integrating by reading the documentation.