PHP中如何使用ajax技术实现局部刷新，不断读取显示数据库MySQL中最新的数据，百度了好久看不大懂，求大神赐教啊，求PHP和ajax的代码！！！

While many popular website applications (WordPress, Drupal, Joomla, etc.) are open source and therefore freely available, running these PHP-based apps on a Windows ...