The Answer: You cannot host code on Blogger: anything that told you that is wrong. Go host it elsewhere.
You probably read a guide like this (This does not deserve to be linked, it is full of wrong information but it serves the purpose of an example). This guide even says that you can host PHP scripts on Google Drive; I doubt that very much. If you want to host CSS and JS on Google Drive then that is a different story, because your users browser will download the code and run it.
To run a server side language like PHP you will still need to host the code yourself. Try using Google App Engine to host your PHP apps.