Want to save template name

Since you are already loading php in this file why don't you pass that as a url parameter: I would advise to have all this running under a user's session with tokens, etc but for now that should do the trick.

Well, there is always an option to use your custom ajax call where you might just add getHtml and getCss to your data. If the use of editor.store() is necessary you can add/update params (which will be passed with any request) on RemoteStorage instance