[PHP]Article system

Im working on a cms but now im stuck with some security problems..

i want to be able to use any code examples etc in the article without makeing
the server read it as real code

articles are getting stored into a txt file and linked to the cms with a database table..
where it stores the link ot the txt file..

im not asking for complete parts of code just asking if there is any safe way of doing this and be
able to output any code without securty problems

names of functions would be nice

Eh, I think I understand-ish, I've always used the html <pre> tag to display code...

htmlspecialchars

http://nl2.php.net/manual/en/functio...ecialchars.php

htmlentities

http://nl2.php.net/manual/en/function.htmlentities.php