Home php教程 php手册 Warning: Cannot modify header information - headers already sent by

Warning: Cannot modify header information - headers already sent by

May 25, 2016 pm 04:52 PM
modify warning

如果在执行php程序时看到这条警告:"Warning: Cannot modify header information - headers already sent by ....".

有以下几种解决方法:

1. Blank lines (空白行):

,检查 后面没有空白行,特别是include或者require的文件.不少问题是这些空白行导致的。

2. Use exit statement (用exit来解决):在header后加上exit();

header ("Location: xxx");exit();

3.用Javascrīpt来解决:

self.location( file.php );"; ?>

可以用Javascrīpt来代替header。另外需要注意,采用这种方法需要浏览器支持Javascrīpt.

4. 用输出缓存来解决:

<?php
... HTML codes ... 

... PHP codes ... 
header ("Location: ...."); 
ob_end_flush(); 
?>
Copy after login

               
               

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转载随意~请带上教程地址吧^^

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