Be very wary of using files with an .inc extension, UNLESS your server is set up to parse them as php files and the contents are contained within php tags.
.inc is a made up extension that actually means nothing. As far as php is concerned it you could include a file named functions.bigbuns and it couldn't care less, HOWEVER if you call that file through the browser, it would be rendered as a plain text file. Therefore, .inc has security implications you should read up on BEFORE placing sensitive data in it. If the .inc file is located outside the web tre than this is less of an issue, but I prefer to use the standard .php extension so that even if the file is called, it just returns an empty page to the browser.
