Аутентификация через Facebook

<?php
$client_id = '578516362116657'; // Client ID
$client_secret = 'eb1814bd3980ab9a306dc35073021fb3'; // Client secret
$redirect_uri = 'http://localhost/facebook-auth'; // Redirect URIs
  

$url = 'https://www.facebook.com/dialog/oauth';

$params = array(
    'client_id'     => $client_id,
    'redirect_uri'  => $redirect_uri,
    'response_type' => 'code',
    'scope'         => 'email,user_birthday'
);

echo $link = '<p><a href="' . $url . '?' . urldecode(http_build_query($params)) . '">Аутентификация через Facebook</a></p>';
// https://www.facebook.com/dialog/oauth?client_id=578516362116657&redirect_uri=http://localhost/facebook-auth&response_type=code&scope=email,user_birthday

// Пример. В вашем случае код будет другой
http://localhost/facebook-auth/?code=AQD5q80zafjvVZoZex87ROxkCvWT9rZhjwZtkBLajYwH20KztPOI0jpb5lHZisPd3mA49Wu_onAeEioU5K6KVuoCliznf61B5bDfZSLFaIn6E7E49zqs4fO6NjTYyxN43LBttCvsSlirJOAtbOpB3oyMrl3bbjlPhGHsCyJzA-DypEIZ1c_36WAEBPmfSq3TroekvTLme3jIzZk0C-93cu8z#_=_

if (isset($_GET['code'])) {
    $result = false;

    $params = array(
        'client_id'     => $client_id,
        'redirect_uri'  => $redirect_uri,
        'client_secret' => $client_secret,
        'code'          => $_GET['code']
    );

    $url = 'https://graph.facebook.com/oauth/access_token';
}

$tokenInfo = null;
parse_str(file_get_contents($url . '?' . http_build_query($params)), $tokenInfo);

array(2) {
  ["access_token"]=>
  string(115) "AAAIOREZCDAnUBAOEmLbNqgHzQSNFoZBBdZC99eNv6DkZA842GUTHP3H7j7YnxEPOZCmZBiPgEZCJCb80zVXDGP9JeX8DGSRi6PU2liZAPQuj9QZDZD"
  ["expires"]=>
  string(7) "5177324"
}

if (count($tokenInfo) > 0 && isset($tokenInfo['access_token'])) {
        $params = array('access_token' => $tokenInfo['access_token']);

        $userInfo = json_decode(file_get_contents('https://graph.facebook.com/me' . '?' . urldecode(http_build_query($params))), true);
        if (isset($userInfo['id'])) {
            $userInfo = $userInfo;
            $result = true;
        }
    }

Array
(
    [id] => 100000317390816
    [name] => Стас Протасевич
    [first_name] => Стас
    [last_name] => Протасевич
    [birthday] => 07/03/1988
    [hometown] => Array
        (
            [id] => 110228142339670
            [name] => Chisinau, Moldova
        )

    [location] => Array
        (
            [id] => 110228142339670
            [name] => Chisinau, Moldova
        )

    [work] => Array
        (
            [0] => Array
                (
                    [employer] => Array
                        (
                            [id] => 159295210819421
                            [name] => Web-Concept
                        )

                    [location] => Array
                        (
                            [id] => 110228142339670
                            [name] => Chisinau, Moldova
                        )

                    [position] => Array
                        (
                            [id] => 108480125843293
                            [name] => Web Developer
                        )

                    [start_date] => 2010-09
                    [end_date] => 2011-10
                )

        )

    [sports] => Array
        (
            [0] => Array
                (
                    [id] => 106011416097502
                    [name] => Ice hockey
                )

        )

    [favorite_athletes] => Array
        (
            [0] => Array
                (
                    [id] => 202766356426583
                    [name] => Michael Jordan
                )

        )

    [inspirational_people] => Array
        (
            [0] => Array
                (
                    [id] => 7170054127
                    [name] => Hans Zimmer
                )

            [1] => Array
                (
                    [id] => 113529011990795
                    [name] => Steve Jobs
                )

            [2] => Array
                (
                    [id] => 225471537469600
                    [name] => Albert Einstein
                )
        )

    [education] => Array
        (
            [0] => Array
                (
                    [school] => Array
                        (
                            [id] => 135979339750670
                            [name] => Лицей Василия Лупу
                        )

                    [year] => Array
                        (
                            [id] => 140617569303679
                            [name] => 2007
                        )

                    [type] => High School
                )

            [1] => Array
                (
                    [school] => Array
                        (
                            [id] => 110260779004118
                            [name] => State University of Moldova
                        )

                    [year] => Array
                        (
                            [id] => 142963519060927
                            [name] => 2010
                        )

                    [concentration] => Array
                        (
                            [0] => Array
                                (
                                    [id] => 189014467787633
                                    [name] => Прикладная информатика
                                )

                        )

                    [type] => College
                )

            [2] => Array
                (
                    [school] => Array
                        (
                            [id] => 110260779004118
                            [name] => State University of Moldova
                        )

                    [degree] => Array
                        (
                            [id] => 200940416612694
                            [name] => Магистр
                        )

                    [year] => Array
                        (
                            [id] => 115222815248992
                            [name] => 2012
                        )

                    [concentration] => Array
                        (
                            [0] => Array
                                (
                                    [id] => 120214931322280
                                    [name] => сетевые технологии
                                )

                        )

                    [type] => Graduate School
                )

        )

    [gender] => male
    [email] => 
 Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
 
    [timezone] => 2
    [locale] => ru_RU
    [languages] => Array
        (
            [0] => Array
                (
                    [id] => 176015189120060
                    [name] => Russian
                )

            [1] => Array
                (
                    [id] => 106059522759137
                    [name] => English
                )

        )

    [verified] => 1
    [updated_time] => 2012-12-06T18:06:38+0000
)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ru">
<head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
    <title>Аутентификация через Facebook</title>
</head>
<body>

<?php

$client_id = '578516362116657'; // Client ID
$client_secret = 'eb1814bd3980ab9a306dc35073021fb3'; // Client secret
$redirect_uri = 'http://localhost/facebook-auth'; // Redirect URIs

$url = 'https://www.facebook.com/dialog/oauth';

$params = array(
    'client_id'     => $client_id,
    'redirect_uri'  => $redirect_uri,
    'response_type' => 'code',
    'scope'         => 'email,user_birthday'
);

echo $link = '<p><a href="' . $url . '?' . urldecode(http_build_query($params)) . '">Аутентификация через Facebook</a></p>';

if (isset($_GET['code'])) {
    $result = false;

    $params = array(
        'client_id'     => $client_id,
        'redirect_uri'  => $redirect_uri,
        'client_secret' => $client_secret,
        'code'          => $_GET['code']
    );

    $url = 'https://graph.facebook.com/oauth/access_token';

    $tokenInfo = null;
    parse_str(file_get_contents($url . '?' . http_build_query($params)), $tokenInfo);

    if (count($tokenInfo) > 0 && isset($tokenInfo['access_token'])) {
        $params = array('access_token' => $tokenInfo['access_token']);

        $userInfo = json_decode(file_get_contents('https://graph.facebook.com/me' . '?' . urldecode(http_build_query($params))), true);

        if (isset($userInfo['id'])) {
            $userInfo = $userInfo;
            $result = true;
        }
    }
}
?>

</body>
</html>

if ($result) {
        echo "Социальный ID пользователя: " . $userInfo['id'] . '<br />';
        echo "Имя пользователя: " . $userInfo['name'] . '<br />';
        echo "Email: " . $userInfo['email'] . '<br />';
        echo "Ссылка на профиль пользователя: " . $userInfo['link'] . '<br />';
        echo "Пол пользователя: " . $userInfo['gender'] . '<br />';
        echo "ДР: " . $userInfo['birthday'] . '<br />';
        echo '<img src="http://graph.facebook.com/' . $userInfo['id'] . '/picture?type=large" />'; echo "<br />";
    }

$_SESSION['user'] = $userInfo;