我的目标是在cron函数中从googlecalendar中检索事件，我需要在访问令牌过期后每1小时不授权请求的情况下执行此操作。
从许多相关的堆栈溢出问题中，我了解到，一开始我通过授权请求获得一个访问令牌，然后将该令牌写入token.json文件。在第一次访问之后，每次我需要访问日历时，如果我以前设置了，那么fgetclient函数将控制令牌是否过期

$client->setAccessType('offline');

函数应该刷新令牌，我应该访问日历的事件，而不授权任何进一步的请求。
我的问题是我无法获得刷新的令牌，它将在一小时后过期，然后我需要手动复制链接，授权请求，然后复制并粘贴验证代码。
我把代码留在下面。

public function fGoogleCalendar($operazione=null){
        //require_once $this->config["googlecalendardir"].'vendor/autoload.php';

        // Get the API client and construct the service object.
        $client = $this->fGCGetClient();
        $service = new Google_Service_Calendar($client);

        // Print the next 10 events on the user's calendar.
        $calendarId = 'primary';
        $optParams = array(
          'maxResults' => 10,
          'orderBy' => 'startTime',
          'singleEvents' => true,
          'timeMin' => date('c'),
        );
        $results = $service->events->listEvents($calendarId, $optParams);
        $events = $results->getItems();

        if (empty($events)) {
            $aEventi="0 events found";
        } else {
            // "Upcoming events:\n";
            foreach ($events as $event) {
                $start = $event->start->dateTime;
                if (empty($start)) {
                    $start = $event->start->date;
                }
                $end = $event->end->dateTime;
                if (empty($end)) {
                    $end = $event->end->date;
                }

                $aEventi[]=array(
                            "nome" => $event->getSummary(),
                            "startdate" => $start,
                            "enddate" => $end 
                        );                          
                $start);
            }
        }
        return $aEventi;

    }

    public function fGCGetClient(){
        require_once $this->config["googlecalendardir"].'vendor/autoload.php';

        $client = new Google_Client(); 
        //die("ok");
        $client->setApplicationName('Google Calendar API PHP Quickstart');
        $client->setScopes(Google_Service_Calendar::CALENDAR_READONLY);
        $client->setAuthConfig($this->config["googlecalendardir"].'credentials.json');
        $client->setAccessType('offline');
         //$client->setApprovalPrompt('auto');
        $client->setPrompt('consent');

        // Load previously authorized token from a file, if it exists.
        // The file token.json stores the user's access and refresh tokens, and is
        // created automatically when the authorization flow completes for the first
        // time.
        $tokenPath = $this->config["googlecalendardir"].'token.json';
        if (file_exists($tokenPath)) {
            $accessToken = json_decode(file_get_contents($tokenPath), true);
            $client->setAccessToken($accessToken);
        }

        // If there is no previous token or it's expired.
        //if (true) {
        if ($client->isAccessTokenExpired()) {
            // Refresh the token if possible, else fetch a new one.
            if ($client->getRefreshToken()) {
                //$client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
                $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
                $client->setAccessToken($client->getAccessToken());
            } else {
                // Request authorization from the user.
                $authUrl = $client->createAuthUrl(); 
                printf("Open the following link in your browser:\n%s\n", $authUrl);
                print 'Enter verification code: ';
                $authCode = trim(fgets(STDIN));

                // Exchange authorization code for an access token.
                $accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
                $client->setAccessToken($accessToken);

                // Check to see if there was an error.
                if (array_key_exists('error', $accessToken)) {
                    throw new Exception(join(', ', $accessToken));
                }
            }

            // Save the token to a file.
            if (!file_exists(dirname($tokenPath))) {
                mkdir(dirname($tokenPath), 0700, true);
            }
            file_put_contents($tokenPath, json_encode($client->getAccessToken()));
        }
        return $client;
    }