Facebook Graph API Get User Access Token

$_SESSION

Array
(
    [fb_state] => 123644
)

Login With Facebook

href: https://www.facebook.com/v12.0/dialog/oauth?client_id=%7BFB-APP-ID%7D&redirect_uri=%7BREDIRECT-URI%7D&state=123644&scope=email%2Cpublic_profile&auth_type=rerequest