api_final_fb_loginbutton

<?php
# -- PARTE 1
# facebook init
$facebook = new Facebook(array(
    'appId'=>'3452352345',
    'secret'=>'89d89d89df89d98jd',
    ));
$user = $facebook->getUser(); # obtenemos ID del usuario


# -- PARTE 2
# verificamos si el ID esta conectado a facebook
if( $user )
    {
    try {
        // Proceed knowing you have a logged in user who's authenticated.
        $user_profile = $facebook->api('/me');
        } catch (FacebookApiException $e) {
        error_log($e);
        $user = null; # error, no esta conectado a facebook
        }
    }

# -- PARTE 3
if( $user ) # si esta conectado, le permitimos desconectar
    $logoutUrl= $facebook->getLogoutUrl();

# -- PARTE 4
else        # si no esta conectado, le permitimos conectar
    {
    $loginUrl= $facebook->getLoginUrl(array(
    # "canvas"=>1,
    # "fbconnect"=>0,
    # 'next'=>''. HTTP_SERVER. 'xdreciver.htm',
#'scope'=>'friends_about_me,friends_activities,friends_birthday,friends_education_history,friends_events,friends_games_activity,friends_groups,friends_hometown,friends_interests,friends_likes,friends_location,friends_notes,friends_online_presence,friends_photo_video_tags,friends_photos,friends_relationship_details,friends_relationships,friends_religion_politics,friends_status,friends_subscriptions,friends_videos,friends_website,friends_work_history,user_about_me,user_activities,user_birthday,user_education_history,user_events,user_games_activity,user_groups,user_hometown,user_interests,user_likes,user_location,user_notes,user_online_presence,user_photos,user_religion_politics,user_status,user_subscriptions,user_website,user_work_history,create_note,email,export_stream,manage_friendlists,offline_access,photo_upload,publish_actions,publish_stream,read_friendlists,read_requests,read_stream,share_item,status_update',
'scope'=>'friends_about_me,friends_activities,friends_birthday,friends_checkins,friends_education_history,friends_events,friends_games_activity,friends_groups,friends_hometown,friends_interests,friends_likes,friends_location,friends_notes,friends_online_presence,friends_photo_video_tags,friends_photos,friends_relationship_details,friends_relationships,friends_religion_politics,friends_status,friends_subscriptions,friends_videos,friends_website,friends_work_history,user_about_me,user_activities,user_birthday,user_checkins,user_education_history,user_events,user_games_activity,user_groups,user_hometown,user_interests,user_likes,user_location,user_notes,user_online_presence,user_photo_video_tags,user_photos,user_relationship_details,user_relationships,user_religion_politics,user_status,user_subscriptions,user_videos,user_website,user_work_history,ads_management,create_note,email,export_stream,manage_friendlists,manage_notifications,manage_pages,offline_access,photo_upload,publish_actions,publish_stream,read_friendlists,read_insights,read_requests,read_stream,share_item,status_update,xmpp_login',
    'redirect_uri'=>''. HTTP_SERVER. ''
    ));
    }

# obteniendo otros perfiles
# $fbperfil = $facebook->api('/mi_username_o_IDNUMBER');


# -- PARTE 6
if( $user ) # si esta conectado
    echo '<img src="https://graph.facebook.com/'. $user. '/picture"> <b>'. $user_profile["name"]. '</b> | <a href="'. $logoutUrl. '">Desincronizar</a>';
else # invitamos a sincronizar
    {

# -- PARTE 5
    echo '<div id="fb-root"></div>';
    echo '<a href="'. $loginUrl. '"><div class="icono6 faceconnect"></div></a>';
    }
?>