$selector->paging = new Paging(0, AdWordsConstants::RECOMMENDED_PAGE_SIZE);
    do {
        // Make the get request.
        $page = $adGroupService->get($selector);
        // Display results.
        if (isset($page->entries)) {
            foreach ($page->entries as $adGroup) {
                printf("Ad group with name '%s' and ID '%s' was found.\n", $adGroup->name, $adGroup->id);
            }
        } else {
            print "No ad groups were found.\n";
        }
        // Advance the paging index.
        $selector->paging->startIndex += AdWordsConstants::RECOMMENDED_PAGE_SIZE;
    } while ($page->totalNumEntries > $selector->paging->startIndex);
}
// Don't run the example if the file is being included.
if (__FILE__ != realpath($_SERVER['PHP_SELF'])) {
    return;
}
try {
    // Get AdWordsUser from credentials in "../auth.ini"
    // relative to the AdWordsUser.php file's directory.
    $user = new AdWordsUser();
    // Log every SOAP XML request and response.
    $user->LogAll();
    // Run the example.
    GetAdGroupsExample($user, $campaignId);
} catch (Exception $e) {
    printf("An error has occurred: %s\n", $e->getMessage());
}
 public function testGetAdGroupsExamples()
 {
     GetAdGroupsExample($this->user, $this->campaignId);
 }