Basically I want to check the extended permissions the user has granted my app.
If any one permission that I want is not given by the user, Then I want the user to be redirected to facebook permission Dialog(Not the oauth dialog which comes first).
Is it possible to do that using php or js sdk(php preferred).
Basically I want to check the extended permissions the user has granted my app.
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First of all, there’s a misunderstanding on your side here: That is only one dialog, it’s only split into two pages where appropriate.
So when asking for (more) extended permissions, you just call the OAuth dialog the normal way (getLoginURL in PHP SDK, FB.login from the JS SDK) – if the user has already authorized your app and only new extended permissions are required, then only the second page of the dialog is shown automatically.