private static function initStats($services) { $res = array(); $res['total'] = array(); $res['average'] = array(); $res['ratio'] = array(); // Initializing the Data arrays for the chart foreach ($services as $service) { $res['total'][$service] = MongoUtils::initArray(); $res['average'][$service] = MongoUtils::initArray(); $res['ratio'][$service] = array('dislike_like' => 0, 'clickback_like' => 0); } $res['total']['all'] = MongoUtils::initArray(); $res['average']['all'] = MongoUtils::initArray(); $res['ratio']['all'] = array('dislike_like' => 0, 'clickback_like' => 0); return $res; }