Google社交登录无效

Question

我正在尝试使用谷歌登录。我有以下两个文件：

的login.php：

public Form1()
{
    InitializeComponent();

    ToolStripItem activeToolStripItem = null;
    menuStrip1.Paint += (o, e) => activeToolStripItem?.Select();
    menuStrip1.ItemClicked += (o, e) => activeToolStripItem = e.ClickedItem;
}

而index.php是：

<?php
require_once __DIR__.'/vendor/autoload.php';

session_start();

$client = new Google_Client();
$client->setAuthConfigFile('client_secret.json');
$client->setRedirectUri('http://localhost/search/index.php/');
$client->addScope(Google_Service_Drive::DRIVE_METADATA_READONLY);
$client->setAccessType("offline");

if (! isset($_GET['code'])) {
  $auth_url = $client->createAuthUrl();
  header('Location: ' . filter_var($auth_url, FILTER_SANITIZE_URL));
} else {
  $client->authenticate($_GET['code']);
  $_SESSION['access_token'] = $client->getAccessToken();
  $redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . '/';
  header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
}

我正在使用此处的确切代码： https://developers.google.com/api-client-library/php/auth/web-app

但是，我被重定向到相同的Google身份验证页面。看来<?php require_once __DIR__.'/vendor/autoload.php'; session_start(); $client = new Google_Client(); $client->setAuthConfig('client_secret.json'); $client->addScope(Google_Service_Drive::DRIVE_METADATA_READONLY); if (isset($_SESSION['access_token']) && $_SESSION['access_token']) { print_r($_SESSION); $client->setAccessToken($_SESSION['access_token']); $drive = new Google_Service_Drive($client); $files = $drive->files->listFiles(array())->getItems(); echo json_encode($files); } else { $redirect_uri = 'http://localhost/search/login.php/'; // echo "I am in else."; header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL)); }  不起作用。

请帮帮我。