I'm using the multisite feature and trying to add a link to posting page. The link should appear on every subsite. Naturally I cannot use the absolute path because it's different for every subsite but relative path doesn't work either as it's pointing to my root. F.e if I put /file.php as path it shows up as pageurl.com/file.php eventhough it should point to pageurl.com/blog/subsite/file.php
So what is the right way to retrieve the correct path?
Great thanks for you help in advance!