Documentaion bugs in 1.7

[eluser]Unknown[/eluser]
The problem is that Apache is trying to process this code ... Probably wrong php configuration, but what exactly ?..

<textarea class="textarea" style="width:100%" cols="50" rows="10">
<?php
class Blog extends Controller {

function index()
{
echo 'Hello World!';
}
}
?>
</textarea>