PHPZabbixAPIでWebシナリオのステップを取得する

$httptests = $api->httptestGet(Array('hostids' => $hostids, 'selectSteps' => 'extend'));

foreach($httptests as $id => $httptest) {
   if($httptest->steps) {
       foreach($httptest->steps as $id => $httpstep) {
          var_dump($httpstep);
       }
   }
}