报错：Namespace declaration statement has to be the very first statement in the script的解决方法

报错：Namespace declaration statement has to be the very first statement in the script，解决方法：

比如报错文件是AccessController.class.php。用系统新建一个txt文本，把文件名字（包括扩展名）改成AccessController.class.php，

并将原AccessController.class.php的代码内容复制过来，保存运行即可！