facebook/facebook-php-sdk-v4 — pull request #309 by SingularityGuy (2014-12-23 14:50:50+00:00)
Title: allow user to provide additional parameters

user can provide auth_type, redirect_uri(already can provide) and scope
in one array.
the main purpose is to let user provide parameters like auth_type while getting login_url
for example
$parameters = [
'scope' => 'scopes , string or array',

auth_type' => 'reauthenticate',
]