How to put music on my iPhone onto iTunes?

I have music on my phone that isn't on my iTunes so how can I put the music onto iTunes? I don't have an icloud by the way

Simply transfer your music from iphone to pc first, then add them to your itunes library.

Using some iphone transfer to transfer music between pc and iphone is very easy. You can find free iphone transfer, like Syncios. Though it is free, it really works great. You may download it to have a try.

This tutorial may be helpful:
http://www.syncios.com/how-to-transfer-music-from-iphone-4s-to-computer.html