[ Facebook] – Facebook login 教學文

本篇是 Facebook login 教學文 因FB版本更新比較快，請以Facebook Develope文件為主。

3M 日本原裝進口 速效型 防水噴霧 170ml 衣物 鞋子 皮革 透氣 防水 團購

平衡豬 獨輪車小豬 平衡玩具 不倒翁平衡豬

手指伸縮狼爪 伸縮爪 機械爪 狼爪 伸縮爪子

香積麵 藥膳 風味 84gx5包 素泡麵 純素 素食 蔬食 慈濟 靜思

補充： 2016-08-09 若fb使用者本身的mail未認證即取不到 email 的值，但user id 還是會回傳，神奇的是若有第二個fb使用者也是email未驗證的帳號登入 回傳的 user id 都會是同一個。

前置作業請參考以下網址：

http://www.hareion.tk/view/209

fb_login.php 登入頁面

<?php
session_start();
require_once('./Facebook/autoload.php');
$fb = new Facebook\Facebook([
'app_id' => '7390***********',//app_id
'app_secret' => '582d6**************',//app_安全碼
'default_graph_version' => 'v2.4',//預設版本
]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['email', 'user_likes']; // 要取得的權限
$loginUrl = $helper->getLoginUrl('http://網址/login-callback.php', $permissions);//取得權限後要跳轉的頁面
if(isset($_SESSION['fb_access_token'])){
try {
// Returns a `Facebook\FacebookResponse` object
$response = $fb->get('/me?fields=id,name,email', $_SESSION['fb_access_token']);
//取得登入者的 id,name,email(若fb使用者本身的mail未認證即取不到此值，即便有取得該使用者的mail權限)
} catch(Facebook\Exceptions\FacebookResponseException $e) {
echo 'Graph returned an error: ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
$user = $response->getGraphUser();
echo 'Hi ~ ' . $user['name'];
echo ' - 你已經登入了<br/>';
echo '<a href="fb_logout.php">Logout!</a>';
}else{
echo '<a href="' . $loginUrl . '">Log in with Facebook!</a>';
}
?>

login-callback.php //登入後的處理頁面

<?php
session_start();
require_once('./Facebook/autoload.php');
$fb = new Facebook\Facebook([
'app_id' => '7390***********',//app_id
'app_secret' => '582d6**************',//app_安全碼
'default_graph_version' => 'v2.4',//預設版本
]);
$helper = $fb->getRedirectLoginHelper();
try {
$accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
if (! isset($accessToken)) {
if ($helper->getError()) {
header('HTTP/1.0 401 Unauthorized');
echo "Error: " . $helper->getError() . "\n";
echo "Error Code: " . $helper->getErrorCode() . "\n";
echo "Error Reason: " . $helper->getErrorReason() . "\n";
echo "Error Description: " . $helper->getErrorDescription() . "\n";
} else {
header('HTTP/1.0 400 Bad Request');
echo 'Bad request';
}
exit;
}
// Logged in
echo '<h3>Access Token</h3>';
var_dump($accessToken->getValue());//取得Token
// The OAuth 2.0 client handler helps us manage access tokens
$oAuth2Client = $fb->getOAuth2Client();
// Get the access token metadata from /debug_token
$tokenMetadata = $oAuth2Client->debugToken($accessToken);
echo '<h3>Metadata</h3>';
var_dump($tokenMetadata);
// Validation (these will throw FacebookSDKException's when they fail)
$tokenMetadata->validateAppId('7390***********');//app_id
// If you know the user ID this access token belongs to, you can validate it here
//$tokenMetadata->validateUserId('123');
$tokenMetadata->validateExpiration();
if (! $accessToken->isLongLived()) {
// Exchanges a short-lived access token for a long-lived one
try {
$accessToken = $oAuth2Client->getLongLivedAccessToken($accessToken);//取得長期Token
} catch (Facebook\Exceptions\FacebookSDKException $e) {
echo "<p>Error getting long-lived access token: " . $helper->getMessage() . "</p>\n\n";
exit;
}
echo '<h3>Long-lived</h3>';
var_dump($accessToken->getValue());
$ab=$accessToken->getValue();
}
$_SESSION['fb_access_token'] = (string) $accessToken; //將Token寫入session裡
// User is logged in with a long-lived access token.
// You can redirect them to a members-only page.
//header('Location: https://example.com/members.php');
?>

fb_logout.php 登出頁面

<?php session_start();
session_destroy();
Header("location:fb_login.php");
?>