This is an old post. The information it contains is probably out of date or innacurate
This is a post that was written a long time ago and is only being kept here for posterity. You should probably look up more recent blog posts related to the subject you are researching
Well known is how Loaded Commerce/CRELoaded protect their google banners they wack on all opensource versions of their code.
Once you have removed the footer in the current version though, it checks the output buffer and you will find it after the closing html tag of your page.
The function that does this is cre_uregisterBasicFunctions(); and if you remove the call to it from application_bottom.php, bye bye ads!
Scarily, if a hacker got control of www.loadedcommerce.com, php code could actually be inserted into EVERY Loaded Commerce installation that doesn’t remove this.