Upload to Dropbox with Curl and refresh token

Hi Fenoma,

As a example you can take a look here. It's not a PHP code, but a command line curl execution. I believe you haven't problem to convert it. The most important is HOW it's gonna work (as idea).

The code you posted as example should not be changed a lot (it can left almost the same). You have not to assume 'ACCESS TOKEN' has a fixed value anymore (as seems you are doing). This token should be represented as rather variable and definitely not as a literal!!! Good idea is to change your code in a way, every place (no limited to your example) where token is used, the literal to be replaced with a function (you can name it to something like 'getToken' for instance). In this function implementation you can check whether available access token is going to expire and if so, refresh it (as denoted in the post linked to). You can keep refresh token, last received access token (as a cache), and calculated time (moment) of current access token expiration (used for check, in followup calls, whether the access token expires). 😉 That's it.

Hope this helps.