php 中

Namespace declaration statement has to be the very first statement in the script 错误解决方法：

在PHP文件中编写有namespace 时候提示此错误，应该将  <?php  开始前面不能有语句，空行也不行。

如果是在含有<html>语言的混合php 文件里面，且文件里面至少有一个<?php   ?>代码段时候，只要用到namespace,该文件的首行必须以<?php开头.

 
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