This is my first post, so let me just take the opportunity to thank the team at Wrox press who have managed to come up with such great people to write such a wonderful book. I really enjoy it.
Now, to the meat...
In page 63, in the first part of code in the top half of the page:
echo $current_flavor '<br/>';
There is a dot missing between the variable and the string, which is needed in order to concatenate them.
It should be
echo $current_flavor . '<br/>';
Take care guys,