Find list of Members in group using google api services

Here is some code I wrote that I think might help you. This code will pull a listing of all the groups you have read access to and their memberships.

When pulling the groups, I check if the variable nextPageToken is set. If this is set, it means you have reached the 200 max limit result set. If nextPageToken is set, the code will continue to loop and grab the next set until nextPageToken is blank.

I make use of the batch class in the first pass at getting group memberships to speed things up. After the first pass, I again then check for the existence of the nextPageToken variable and continue to loop until all members are returned.

After the script runs, an array called $lists is populated with all the groups and their respective memberships.

<?php
  $start = microtime(true);

  require_once('/path/to/google-api-php-client/src/Google/autoload.php');
  $service_account_name = 'your service account address'; //Email Address
  $key_file_location = '/path/to/your.p12'; //key.p12

  $client = new Google_Client();
  $client->setApplicationName("Client_Library_Examples");
  $dir = new Google_Service_Directory($client);
  $domain = 'yourdomain.com';

  if (isset($_SESSION['service_token'])) {
    $client->setAccessToken($_SESSION['service_token']);
  }

  $key = file_get_contents($key_file_location);
  $cred = new Google_Auth_AssertionCredentials(
    $service_account_name,
    array('https://www.googleapis.com/auth/admin.directory.group.readonly'),
    $key
  );

  $cred->sub = "[email protected]"; // a privilidged users email address
  $client->setAssertionCredentials($cred);
  if ($client->getAuth()->isAccessTokenExpired()) {
    $client->getAuth()->refreshTokenWithAssertion($cred);
  }

  $_SESSION['service_token'] = $client->getAccessToken();

  // Get all of our groups
  $googleGroups = $dir->groups->listGroups(array('domain'=>$domain));
  $groups = $googleGroups->getGroups();

  // if we have a paginated result set, continue doing a lookup until we are at the end
  while (isset($googleGroups->nextPageToken) && ($googleGroups->nextPageToken != '')) {
    $googleGroups = $dir->groups->listGroups(array('domain'=>$domain,'pageToken'=>$googleGroups->nextPageToken));
    $groups = array_merge($groups, $googleGroups->getGroups());
  }

  // Ok, we have all our groups. Now lets build an array that we can use later to populate with group members
  $lists = array();
  foreach ($groups as $key=>$val) {
    $lists[$val->id] = array('id'=>$val->id,'description'=>$val->description,'email'=>$val->email,'name'=>$val->name,'members'=>'');
  }

  // Doing a batch query for all members of the groups to reduce execution time
  $client->setUseBatch(true);
  $batch = new Google_Http_Batch($client);
  foreach ($groups as $k=>$v) {
    $members = $dir->members->listMembers($v->email);
    $batch->add($members, $v->id);
  }

  // execute our batch query
  $results = $batch->execute();

  // turn off batch queries now so we can query for more members in the case of paginated result sets
  $client->setUseBatch(False);
  foreach ($results as $k=>$v) {
    $all = $v->getMembers();
    $id = substr($k, 9); // the array key is in the form of response-XXX, lets get rid of the response- bit

    while (isset($v->nextPageToken) && ($v->nextPageToken != '')) {
      $members = $dir->members->listMembers($lists[$id]['email'],array("pageToken"=>$v->nextPageToken));
      $v->nextPageToken = $members->nextPageToken;
      $all = array_merge($all, $members->getMembers());
    }

    foreach ($all as $key=>$val) {
      $lists[$id]['members'][] = $val->email;
    }

  }

  $time_elapsed_secs = microtime(true) - $start;
  print "\n\n" . $time_elapsed_secs . "\n\n";

https://developers.google.com/admin-sdk/directory/v1/reference/members/list

You can check this link and this is the "GET" for it

GET https://www.googleapis.com/admin/directory/v1/groups/groupKey/members

public function getAllGroupMembers($groupid, $role = null)
{

     $allmembers = array();
      try {
             $pageToken = NULL;

    $optParams = array(
        'roles' => $role,
       
    );
        do {
            if ($pageToken) {
                $optParams['pageToken'] = $pageToken;
            }
            try {
                $results = self::$service_directory->members->listMembers($groupid,$optParams);
            } catch (Exception $e) {
                print 'An error occurred: ' . $e->getMessage() . 'calling listmemembers function';
            }
            $pageToken = $results->getNextPageToken();
               
            $allmembers = array_merge($allmembers, $results->getMembers()); 

            
        } while ($pageToken);
    } catch (Exception $e) {
        print 'An error occurred: ' . $e->getMessage();
    }
 
   return  $allmembers;
    
    
}