<p>I am searching for a tutorial <code>(optimally with Zend Framework)</code> on how to use <code>PHPUnit</code>.</p>

<p>I have found a couple on <code>google</code> but have not quiet understood it yet.</p>

For information about
PHPUnit
, be sure to read the
documentation
. It does not look too bad IMO. There is a blog entry about
Automatic testing of MVC applications created with Zend Framework
which looks quite good, too. :)