php Cannot modify header information - headers already sent_PHP教程

This article introduces various solutions to php Cannot modify header information - headers already sent by set , friends who need it can refer to it.

Set output_buffering to On in the php configuration file php.ini. Just turn it on.

output_buffering = On　

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All or nothing, now or never.

There are several solutions:

1. Blank lines:
Make sure no blank line after of the calling php script.
Check that there are no blank lines after , especially include or require files. Many problems are caused by these blank lines.

2. Use exit statement (use exit to solve):

The code is as follows

代码如下	复制代码
Use exit after header statement seems to help some people 在header后加上exit(); header ("Location: xxx"); exit();

Copy code

Use exit after header statement seems to help some people

代码如下	复制代码

Add exit();

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

代码如下	复制代码
... HTML codes ... ... PHP codes ... header ("Location: ...."); ob_end_flush(); ?>

Use Javascript (use Javascript to solve):

The code is as follows

Copy code

Since it's a script, it won't modify the header until execution of Javascript. You can use Javascript to replace the header. But I did not execute the above code successfully... Also note that using this method requires the browser to support Javascript. 3b. Use output buffering (use output buffering to solve):

The code is as follows	Copy code
... HTML codes ... ... PHP codes ... header ("Location: ...."); ob_end_flush(); ?> http://www.bkjia.com/PHPjc/632237.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632237.htmlTechArticleThis article introduces a variety of solutions to php Cannot modify header information - headers already sent by set, if necessary Friends can refer to it. In the php configuration file php.ini...