估计搜索结果| Gmail API PHP

我正在尝试获取给定搜索的电子邮件数量（已读和未读分别显示）。我已经读到labels.get（）函数可以做到这一点，但我不知道如何使用它。以下是我必须检测的代码，对于给定的发件人，如果我的结果小于或大于100。

      require_once '../../vendor/autoload.php';
      session_start();
      $client = new Google_Client();
      $client->setAuthConfigFile('../../client_secrets.json');
      $client->addScope(Google_Service_Drive::DRIVE_METADATA_READONLY);
      $client->addScope(Google_Service_Gmail::GMAIL_READONLY);
      $client->setAccessType("offline");
      $client->setApprovalPrompt('force');
      $client->setAccessToken($_SESSION['token']);
      $service = new Google_Service_Gmail($client);
      $sender = array();
      $sender[] = 'sender1@email.com';
      $sender[] = 'sender2@email.com';
      $sender[] = 'sender3@email.com';
      function countfrom($service, $userId, $expeditor) {
            try
            {
              unset($optParamsamz);
              $optParamsamz = [];
              $optParamsamz['maxResults'] = 100; // Return Only 5 Messages
              $optParamsamz['q'] = "From: '".$expeditor."'  "; 
              $messagesamz = $service->users_messages->listUsersMessages('me',$optParamsamz);
              $listamz = $messagesamz->getMessages();
              echo sizeof($listamz);
          }
         catch (Exception $e)
            {
              print 'An error occurred: ' . $e->getMessage();
            }
          }
foreach ($sender as $key => $value)
            {
             echo $value .': ';
             countfrom($service,$_SESSION['emaile'],$value)  ;
             echo '<br/>';
            }

-------------------编辑------------------------

我尝试了一种新的解决方案，似乎更接近我想要的。现在问题来自谷歌，谷歌为结果返回了一些奇数

<?
  require_once '../../vendor/autoload.php';
  session_start();
  $client = new Google_Client();
  $client->setAuthConfigFile('../../client_secrets.json');
  $client->addScope(Google_Service_Drive::DRIVE_METADATA_READONLY);
  $client->addScope(Google_Service_Gmail::GMAIL_READONLY);
  $client->setAccessType("offline");
  $client->setApprovalPrompt('force');
  $client->setAccessToken($_SESSION['token']);
  $service = new Google_Service_Gmail($client);
  $sender_array[] = 'sender1@sender.com';
  $sender_array[] = 'sender2@sender.com';
  $sender_array[] = 'sender3@sender.com';
  $sender_array[] = 'sender4@sender.com';
  foreach ($sender_array as $key => $expeditor)
  {
    $optParamsamz1['q'] = "From: '".$expeditor."' is:read  "; 
    $optParamsamz2['q'] = "From: '".$expeditor."'   "; 
    echo $expeditor.": ".$service->users_messages->listUsersMessages('me',$optParamsamz1)->getResultSizeEstimate() . "
                       ".$service->users_messages->listUsersMessages('me',$optParamsamz2)->getResultSizeEstimate(); 
    echo "<br>";
  }

？>