Xml file produced from the entire web site or blog posts

Hi
I dont know this topic is written in this part correctly or not.so i apologize before.
as you know in the feedburner you can get a xml file from your site rss. but it depends on number of your site entries shown in rss feed that in some blog services you can set that( number of entries in rss)
now i need an online service or a solution that i can get a xml file from all entries of site not only from last number of site entries…like wordpress or other weblog services like mihanblog.com and etc.
in brief i need a solution to get a xml file from all posts of a non-wordpress blog or similar that has a rss feed i cant set its number.
i hope i could explain how i need. because my english ability is not very strong.
Thanks a lot.

You need to do a db query to fetch your date, throw an xml header to tell the browser what’s coming and then loop through your data and output the xml text.

Thanks for your reply
but i’m not a professional user and didn’t get “db a query to fetch data”.could u explain more detailed. do you mean of “Db” is Database? if so, i cant access the database of my weblog.because thats a weblog and i use a weblog service.
waiting for your reply my friend…