PHP - 错误调用未定义的方法mysqli_result :: store_result（）

Question

我正在开发一个PHP应用程序并连续调用两个存储过程。 当我尝试这样做时会出现以下错误

     Command out of sync; you can't run this command now

我检查了一些解决方案并添加了store_result()函数，但现在又标记了另一个错误

     Call to undefined method mysqli_result::store_result()

这是我的应用程序的示例代码

        $sql         = "CALL get_count_posttype('POST')";
        $result      = $conn->query($sql);
        $postCount   = $result->data_seek(0);

        #i tried to use the following as some post suggested
        #i am getting the following error
        #Call to undefined method mysqli_result::store_result()
        //$result->store_result(); 
        //$result->free_result();

        $sql         = "CALL get_postview_for_admin($offset,$recLimit,'POST')";

        $result      = $conn->query($sql);

        # SQL error : Commands out of sync; you can't run this command now

        #current PHP Version 5.5.9