Hmm i think there is a small misunderstanding ? :) 

When i said external server i meant facebook.com, in other words a server that i do not own,

 

Facebook got API which allows web owners to upload photos to fb albums through website.

I want to use phpfileuploader so it'll upload files directly from input to fb through that API instead of having it to upload to my server then again upload to fb, which takes double the time to do...