Under the title, 'Post-purchase benefits' there is a link called 'Examples', which lead to this URL:
http://examples.oreilly.com/phphks/
There are two files there. I downloaded the zip file and it contains the code. The other is likely to be identical, but using a different form of compression.
http://examples.oreilly.com/phphks/
There are two files there. I downloaded the zip file and it contains the code. The other is likely to be identical, but using a different form of compression.