I've noticed that in a WordPress MU install with domain mapping enabled, some functions return URIs that don't use the current WPMU site's primary domain name which possibly means they are "WPMU ...
My understanding is that site_url() returns the location where the wordpress core files are. So, if my blog is hosted at http://example.com/blog then site_url() returns http://example.com/blog But ...
I'm using site_url() for my href for anchors. I want to control what when I send the user to a secure page or non secure page. I thought I could do that with site_url('/foo', 'http') and ...