public static function getContacts($list, $contacts) { $request = new ApiRequest(); $contactIds = array(); if (is_array($contacts)) { foreach ((array) $contacts as $contact) { $contactIds[] = is_object($contact) ? $contact->id : $contact; } } else { $contactIds[] = is_object($contacts) ? $contacts->id : $contacts; } $listItems = self::handleResponse($list, $request->newGet("lists/{$list->id}/listitems/?_ids=" . implode(',', $contactIds))); return $listItems; }