Ajax 和 XML: 将 Ajax 用于聊天-使用 Ajax 和 PHP 创建聊天应用程序
了解如何使用 Asynchronous JavaScript™ + XML (Ajax) 和 PHP 在 Web 应用程序中建立聊天系统。您的客户不需要下载或安装任何专门的即时消息通讯软件，就能和您及其他客户讨论网站的内容。
Web 2.0 一词出现以来，开发人员都在说社区。不论您是否认为这有点夸大其辞，但让用户或读者能够方便地实时讨论页面主题或者销售的产品，这一想法还是很吸引人的。但是怎么办呢？能否在推销产品的页面中加入聊天，而不必让客户安装任何特殊的软件包括 Adobe Flash Player 呢？当然！实践证明，用免费的现成工具如 PHP、MySQL、动态 HTML (DHTML)、Ajax 和 Prototype.js 库就能完全做到。
不再罗嗦了，让我们立即开始吧。
本文转自：IBM developerWorks 中国
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