Is it possible to get the ID (Facebook Graph API) of a user who is currently logged in, without any access tokens?
If not, then how do I get new access tokens every time a user visits my page?
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Is it possible to get the ID (Facebook Graph API) of a user who is currently logged in, without any access tokens?
If not, then how do I get new access tokens every time a user visits my page?
You will need to init the Facebook Javascript SDK and the user will have to have authorized your app at least one time. After that when the user visits your page as long as they are logged into Facebook you’ll have access to the id and can retrieve it using
FB.getLoginStatus
the response will contain the information you’re looking for.
Check this blog post for more details on setting up the FB init and the initial login.
https://developers.facebook.com/blog/post/525/