AJAX
Introduction
AJAX is
about updating parts of a web page, without reloading the whole page.
What
is AJAX?
AJAX =
Asynchronous JavaScript and XML.
AJAX is a
technique for creating fast and dynamic web pages.
AJAX allows
web pages to be updated asynchronously by exchanging small amounts of data with
the server behind the scenes. This means that it is possible to update parts of
a web page, without reloading the whole page.
Classic web
pages, (which do not use AJAX) must reload the entire page if the content
should change.
Examples of
applications using AJAX: Google Maps, Gmail, Youtube, and Facebook tabs.
How
AJAX Works
AJAX is
Based on Internet Standards
AJAX is
based on internet standards, and uses a combination of:
XMLHttpRequest
object (to exchange data asynchronously with a server)
JavaScript/DOM
(to display/interact with the information)
CSS (to
style the data)
XML (often
used as the format for transferring data)
AJAX
applications are browser- and platform-independent!
Google
Suggest
AJAX was
made popular in 2005 by Google, with Google Suggest.
Google
Suggest is using AJAX to create a very dynamic web interface: When you start
typing in Google's search box, a JavaScript sends the letters off to a server
and the server returns a list of suggestions.
Start Using
AJAX Today
In our PHP
tutorial, we will demonstrate how AJAX can update parts of a web page, without
reloading the whole page. The server script will be written in PHP.
If you want
to learn more about AJAX, visit our AJAX tutorial.
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