Ajax tutorial. Introduction: Although the concept isn't entirely new, XMLHttpRequest technology is implimented on more sites now than ever. Compatibility is no longer an issue (IE, Mozilla and Opera all support it), and the benefits to using it are amazing. There are too many PHP programmers avoiding any work with JavaScript beyond simple form validation, and for good reason. It's difficult to keep several languages proficiently under your belt. But using the XMLHttpRequest object is not as hard as everybody thinks, and you don't need to buy and memorize another reference manual.
Let's Get To It! Asynchronous JavaScript and XML, or AJAX is a method of sending and receiving data (usually XML) from a server-side application through javascript. As PHP developers, it might seem tempting to avoid the use of Javascript and leave it to the dsigner. If you're working for a small or medium sized company interested in implementing AJAX solutions, you might end up responsible for figuring out how. Variables: Very Dynamic Web Interfaces. February 09, 2005 One of the classic drawbacks to building a web application interface is that once a page has been downloaded to the client, the connection to the server is severed.
Any attempt at a dynamic interface involves a full roundtrip of the whole page back to the server for a rebuild--a process which tends to make your web app feel inelegant and unresponsive. In this article, I'll be exploring how this problem can be tackled with the use of JavaScript and the XMLHttpRequest object. I'm sure you're familiar with the traditional interface model for a web application. The user requests a page from the server, which is built and delivered to the browser. This page includes an HTML form element for capturing data from the user. Once the user posts their input back to the server, the next page can be built and served based on the input, and so the process continues. Contrast this to the standard behavior of the same task represented through a web interface. Enter JavaScript The Basics. Iconico - Accurate Computer Design and Development Tools. Team TIBET(tm) Prototype JavaScript Framework: Class-style OO, Ajax, and more.
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