Hi Tech Geek, Probably you'll want to start with http://www.mediawiki.org/wiki/Extensions#Writing_Extensions . There are several different types of extensions, e.g. special page extensions; hook extensions; tag extensions; etc. If you're making a special page, for instance, you can find a simple example called myExtension, utilizing four files, at http://www.mediawiki.org/wiki/Manual:Special_pages#Basic_special_page_templ…. There is a line in the body file you can uncomment/modify to get it to output something. Remember that if you're getting it to say "Hello world," you won't be using echo("Hello world");, but rather $wgOut->addWikiText("Hello world"); or perhaps $wgOut->addHTML("Hello world"); (although be careful about XSS issues if you use addHTML), and that you'll need to have put globals $wgOut; earlier in the function to bring it into scope. You are on the right track in looking at simple extensions already existent as preparation for writing your own. I used http://www.mediawiki.org/wiki/Extension:RemoveRedlinks to help me figure out how to write http://www.mediawiki.org/wiki/Extension:RPED (which is still under development but is being tested at http://rped.org/wiki/index.php?title=RPED:Sandbox ). I think I also looked at some of the special pages under includes/specials. Don't forget, when you're looking up stuff on the Mediawiki site, to check out the categories (e.g. http://www.mediawiki.org/wiki/Category:Extensions_by_implementation_type ) and their parent and sister categories, which can often help you find the documentation and extensions that you're looking for. When I get SVN access, I'll probably add a "hello world" example extension for easy download by beginners. Good luck, -Tisane On Wed, Mar 10, 2010 at 12:08 PM, Tech Geek <techgeek12345(a)gmail.com>wrote;wrote: