Facebook SDK：带有消息“DateTime::__construct()”的未捕获异常“异常”

Posted 2023-02-24

【中文标题】Facebook SDK：带有消息“DateTime::__construct()”的未捕获异常“异常”

【英文标题】：Facebook SDK: Uncaught exception 'Exception' with message 'DateTime::__construct()

【发布时间】：2016-02-27 23:06:49

【问题描述】：

我将 facebook SDK 用于“使用 Facebook 登录”我正在使用以下代码。我有 2 个网站，一个带有 SSL 证书，一个带有非 SSL 证书。两者都有不同的托管服务提供商。现在的问题是，当我在非 ssl 网站上使用此代码时，它可以完美运行（我也有两个 facebook 应用程序供他们使用）。但是当我在带有 ssl 证书的网站上使用它时。它给出了以下错误：

致命错误：未捕获的异常 'Exception' 带有消息 'DateTime::__construct(): 依赖系统的时区设置是不安全的。您需要使用 date.timezone 设置或 date_default_timezone_set() 函数。如果您使用了这些方法中的任何一种，但仍然收到此警告，您很可能拼错了时区标识符。我们现在选择时区“UTC”，但请设置 date.timezone 以选择您的时区。在 /home/mediahyp/public_html/facebook/src/Facebook/Authentication/AccessToken.php:156 堆栈跟踪：#0 /home/mediahyp/public_html/facebook/src/Facebook/Authentication/AccessToken.php(156)：DateTime- >__construct() #1 /home/mediahyp/public_html/facebook/src/Facebook/Authentication/AccessToken.php(57): Facebook\Authentication\AccessToken->setExpiresAtFromTimeStamp(1453623903) #2 /home/mediahyp/public_html/facebook/ src/Facebook/Authentication/OAuth2Client.php(247): Facebook\Authentication\AccessToken->__construct('CAALR8BH5vloBAP...', 1453623903) #3 /home/mediahyp/public_ in /home/mediahyp/public_html/facebook/src /Facebook/Authentication/AccessToken.php 第 156 行

这是我使用的代码：

<?php
session_start();
require_once __DIR__ . '/src/Facebook/autoload.php';
$fb = new Facebook\Facebook([
  'app_id' => 'app_id',
  'app_secret' => 'app_secret',
  'default_graph_version' => 'v2.4',
  ]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['email']; // optional

try 
    if (isset($_SESSION['facebook_access_token'])) 
        $accessToken = $_SESSION['facebook_access_token'];
     else 
        $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($accessToken)) 
    if (isset($_SESSION['facebook_access_token'])) 
        $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
     else 
        // getting short-lived access token
        $_SESSION['facebook_access_token'] = (string) $accessToken;
        // OAuth 2.0 client handler
        $oAuth2Client = $fb->getOAuth2Client();
        // Exchanges a short-lived access token for a long-lived one
        $longLivedAccessToken = $oAuth2Client->getLongLivedAccessToken($_SESSION['facebook_access_token']);
        $_SESSION['facebook_access_token'] = (string) $longLivedAccessToken;
        // setting default access token to be used in script
        $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
    
    // redirect the user back to the same page if it has "code" GET variable
    if (isset($_GET['code'])) 
        header('Location: ./');
    
    // getting basic info about user
    try 
        $response = $fb->get('/me?fields=name,first_name,last_name,email, gender,relationship_status');
        $profile = $response->getGraphUser();
     catch(Facebook\Exceptions\FacebookResponseException $e) 
        // When Graph returns an error
        echo 'Graph returned an error: ' . $e->getMessage();
        session_destroy();
        // redirecting user back to app login page
        header("Location: ./");
        exit;
     catch(Facebook\Exceptions\FacebookSDKException $e) 
        // When validation fails or other local issues
        echo 'Facebook SDK returned an error: ' . $e->getMessage();
        exit;
    

    // printing $profile array on the screen which holds the basic info about user


    echo $profile->getName();
    echo "<br>";
    echo $profile->getEmail();
    echo "<br>";
    echo $profile->getID();
    echo "<br>";
    echo $profile->getGender();
    echo "<br>";
    echo $profile->getrelationship_status();


    // Now you can redirect to another page and use the access token from $_SESSION['facebook_access_token']
 else 
    // replace your website URL same as added in the developers.facebook.com/apps e.g. if you used http instead of https and you used non-www version or www version of your website then you must add the same here
    $loginUrl = $helper->getLoginUrl('https://www.website.com/', $permissions);
    echo '<a href="' . $loginUrl . '">Log in with Facebook!</a>';


?>

【参考方案1】：

您遇到此问题的托管服务提供商上的 PHP 安装可能没有在 php.ini 中设置默认时区。

您可以在脚本顶部定义它：

date_default_timezone_set('UTC');