Upload file directly on dropbox

[Cross-linking for reference: https://stackoverflow.com/questions/38935509/dropbox-upload-file ]

It looks like you're using the PHP Core SDK for the deprecated API v1. We recommend migrating to API v2 whenever possible. We don't have an official PHP SDK for API v2, but there are some third party ones listed here.

Anyway, to answer your questions:

1) That uploadFile method will return the metadata for the uploaded file if the upload was successful, and will raise an exception if not.

2) Using the PHP Core SDK, you'll need to have the data on your server in order to upload it. Assuming this is a web app though, you could upload it directly from the user's browser, but you'd have to build that integration in JavaScript. We are working on a JavaScript SDK for API v2.

Alternatively, if you have a URL for the file you want to upload from somewhere, you can upload the file to Dropbox using that URL without passing the data through your server. On API v1, you would use /save_url for that, but it's unfortunately not implemented in the PHP Core SDK. On API v2, you would use /files/save_url.

3) Yes, you can create folders using the API. E.g., in the PHP SDK, you would use the createFolder method. You don't actually need to explicitly create parent folders when uploading files though. For example, if you upload a file to /Documents/myfile.docx, the "Documents" folder will automatically be created if it doesn't already exist.