MongoDBクエリの結果を配列に変換

//データ同期public function data_Sync(){

    $filter = [];
    $options = [  'projection' => ['_id' => 0]];//        _id

    //     
    $query = new \MongoDB\Driver\Query($filter, $options);
    $cursor = $this->mongodb->executeQuery('test.mydata', $query);

    $cursor =  $cursor->toArray();//tp5     

    foreach ($cursor as $key=>$value){
         $value = ((array)$value);//    array  

         $res = Db::name('sreadreport')->insert($value);

    }

}