Hi, I need to integrate dropbox with a Php Script where it is asking for dropbox Access token and Root Directory. So I created a app and got the access token but what is the root directory?
It sounds like you're trying to configure a pre-made script, so exactly what you should supply will depend on how the script works and what you want it to do. That being the case, I can't exactly tell you what you would want to put in. You may want to refer to the documentation or support resources for the script for more information on configuring it.
On the Dropbox API side of things, API apps can specify a path when making an API call. When referring to the root folder itself, the Dropbox API expects the app to supply the empty string "". Or, for some other directory, it could specify a path like "/folder".