tell the upcoming group test to ignore it.
                This directive can appear anywhere in the file and works
                when a whole file of test cases is loaded (see below).
                We will call this sample <em>file_test.php</em>.
            </p>
            <p>
                Next we create a group test file, called say <em>group_test.php</em>.
                You will think of a better name I am sure.
                We will add the test file using a safe method...
<pre>
&lt;?php
  