Practical Web 2.0 Applications with PHP

CHAPTER 10Implementing Web 2.0 Features

Up until now in this book, we have looked at various techniques of using Ajax (that is, the XMLHttpRequest object with the help of Prototype) to manipulate data in the web application we are developing.

Some examples of this include updating the HTML content on a web page dynamically, validating forms, and using JSON as a means to exchange data between the client and the server.

Although these techniques are very useful and somewhat straightforward to implement, they are not the only features that define a web site as being "Web 2.0." In this chapter, we will look at some of the other features of Web 2.0, which include the following:

• Tags. A tag is typically one or two words used to describe some arbitrary ...