php Codeigniter：消息：无法修改标头信息 - 标头已发送（输出开始于
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Codeigniter: Message: Cannot modify header information - headers already sent by (output started at
提问by Dan
I have created a dynamic menu CMS website. I developed in a Windows system. When i run my project in windows operating system, My project runs without any error. But now uploaded it into Linux Operating system server i am getting warning & error like:
我创建了一个动态菜单 CMS 网站。我是在Windows系统下开发的。当我在 Windows 操作系统中运行我的项目时，我的项目运行没有任何错误。但现在将它上传到 Linux 操作系统服务器，我收到警告和错误，如：
A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /home/ansofcm8/public_html/apps/resources/math/application/core/MY_Controller.php:1)
Filename: libraries/Session.php
Line Number: 675
What could be the reason. Please help me.
可能是什么原因。请帮我。
回答by HymanPoint
There seems to be whitespace before the php open tag <?phpin MY_Controller.php.
<?phpMY_Controller.php 中的 php 打开标签前似乎有空格。
Check all PHP files and remove the whitespace before the <?phptag. If there is a space or new line, the body of the http request is started, and you can't add new headers to the http request.
检查所有 PHP 文件并删除<?php标签前的空格。如果有空格或换行符，则开始http请求的正文，并且无法向http请求添加新的标头。
