The following URL is the request for permissions page of a Facebook application.
The [FB_APP_URL] is the App Namespace which is set in the Facebook application settings.
The [PERMISSIONS] is the comma separated string. (ex. email,read_stream)
Done =)
Reference: Authentication – Facebook Developers
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why always show Facebook Logo and Link Go to Facebook.com ?
do you mean the request permission page? It is designed by facebook.