xajax is a PHP class library that allows you to
easily create powerful, Web-based, Ajax
applications or plugins using only HTML, CSS,
JavaScript, and PHP. Applications developed with
xajax can asynchronously call server-side PHP
functions and update content without reloading the
page. xajax is object oriented, supports passing
single and multidimensional arrays and associative
arrays, easy asynchronous form processing, and
supports a wide range of Unicode characters and
languages encoded with UTF-8.