PHP and Ajax W hile theconcept of Ajax containsa handy set of functionality for creating actions on the fly, if you are not making use of its ability to connect to the server, you are really just using basic JavaScript. Not that there is anything truly wrong with that, but the real power lies in joining the client-side functionality of JavaScript with the server-side processing of the PHP language using the concept of Ajax. Throughout this chapter, I will run through some examples of how PHP and Ajax can be used together to design some basic tools that are quite new to Internet applications but have been accessible to desktop applications for ages. The ability to make a call to the server without a page refresh is one that is quite powerful, if harnessed correctly. With the help of the powerful PHP server-side language, you can create some handy little applications that can be easily integrated into any web project. Why PHP and Ajax? So, out of all of the available server-side processing languages (ASP, ASP.NET, ColdFusion, etc.), why have I chosen todevote this book to the PHP language, as any of them can function decently with Ajax technologies? Well, the truth is that while any of the aforementioned languages will perform admirably with Ajax, PHP has similarities with the JavaScript language used to control Ajax—in functionality, code layout, and ideology…..

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