How to make RSS Feed for other publishers

[swkhod]

Hi,
i have bookstore website including an article directory. i want to know how to make a script either in java/php to create rss

feed for others website/publisher for having fresh content for them.

Just like given below website provides fresh content to other publishers

Most Recent Articles from MAIN Category

<script language="javascript" src="http://js.amazines.com/articlefeed.js?c=&t=1&b=1&m=10&h=3&r=0&a=&uid=3d7c
47fb-d86d-45bd-b368-e6b57881fec7"></script><br><a href="http://www.amazines.com/">Free Articles</a>

from advertisment category: Most Recent Articles about Advertising

<script language="javascript" src="http://js.amazines.com/articlefeed.js?c=,13&t=1&b=1&m=10&h=3&r=0&a=&uid=3
d7c47fb-d86d-45bd-b368-e6b57881fec7"></script><br><a href="http://www.amazines.com/">Free Articles</a></body></p>