// Get the service, which loads the required classes.
$adGroupCriterionService = $user->GetService('AdGroupCriterionService', ADWORDS_VERSION);
$biddableAdgroupCriterion = new BiddableAdGroupCriterion();
$biddableAdgroupCriterion->adGroupId = $adGroupId;
$biddableAdgroupCriterion->criterion = new Criterion($criterionId);
$CPCbid = new CpcBid();
$CPCbid->bid = new Money(0.035000);
$biddingStrategyConfiguration = new BiddingStrategyConfiguration();
$biddingStrategyConfiguration->bids = $CPCbid;
$biddableAdgroupCriterion->biddingStrategyConfiguration = $biddingStrategyConfiguration;
var_dump($biddableAdgroupCriterion);
// Create operation.
$operation = new AdGroupCriterionOperation();
$operation->operand = $biddableAdgroupCriterion;
$operation->operator = 'SET';
$operations = array($operation);
// Make the mutate request.
$result = $adGroupCriterionService->mutate($operations);