Returning to this part of the series, I'll demonstrate how useful interfaces can be, by implementing the "HTMLRenderer" interface on a couple of MySQL processing classes that have nothing in common with the (X)HTML widgets explained in the previous tutorial. In this way, by the end of this article you'll have a decent background for working with interfaces as well as a clear idea about its concrete implementation in PHP applications.
By using the code generated in the previous tutorial of the series, they show you how to use it in a more real-life situation, rendering the results in an HTML automatically...
