在.htaccess文件中处理PHP响应的标头？

Is it possible to add headers (defined in a .htaccess file) to a response generated by PHP?

是否可以将标头（在.htaccess文件中定义）添加到PHP生成的响应中？

I have the following .htaccess file in my that should add a Header TestHeader to each response delivered by my Apache Webserver:

我有以下.htaccess文件，应该为我的Apache Webserver提供的每个响应添加一个Header TestHeader：

#<IfModule mod_headers.c>
#  Header unset X-Powered-By
  Header add TestHeader "It works."
#</IfModule>

I also have three additional files in that folder:

我在该文件夹中还有三个附加文件：

html.html

中将Html.HTML
```
<html>content</html>
```
1.php

1.PHP
```
<?php
echo "<html>content php</html>";
```
2.php

2.PHP
```
<?php
header("TestHeader: Sent from PHP.");
echo "<html>content php</html>";
```
- Requesting html.html returns the header TestHeader: "It works."
- 请求html.html返回标题TestHeader：“它有效。”
- Requesting 1.php does not return header TestHeader
- 请求1.php不会返回标头TestHeader
- Requesting 2.php returns the header TestHeader: "Sent from PHP."
- 请求2.php返回标题TestHeader：“从PHP发送”。

Is it somehow possible to manipulate the response header from PHP output using .htaccess directives?

是否有可能使用.htaccess指令操作PHP输出的响应头？

EDIT: PHP runs as FastCGI on the server.

编辑：PHP在服务器上作为FastCGI运行。

2 个解决方案

#1

This is likely to be a problem with your Apache version and the fact that PHP runs as FastCGI.

这可能是您的Apache版本的问题以及PHP作为FastCGI运行的事实。

In Apache 2.2.X there was a bug: https://bz.apache.org/bugzilla/show_bug.cgi?id=49308

在Apache 2.2.X中有一个错误：https：//bz.apache.org/bugzilla/show_bug.cgi？id = 49308

I found a couple of other posts that propose to use the always condition to fix the problem:

我找到了一些其他帖子，建议使用always条件来解决问题：

Header always add TestHeader "It works."

Also see:

另见：

https://serverfault.com/questions/152373/mod-headers-not-working-for-php-mod-fastcgi-pages
https://serverfault.com/questions/152373/mod-headers-not-working-for-php-mod-fastcgi-pages
https://serverfault.com/questions/383011/mod-headers-not-sending-headers-when-file-is-php
https://serverfault.com/questions/383011/mod-headers-not-sending-headers-when-file-is-php
problems using mod_headers with php-fpm/mod_fastcgi
使用mod_headers与php-fpm / mod_fastcgi的问题
Comments in: Apache won't set headers for PHP script
评论：Apache不会为PHP脚本设置标头

#2

You can use SetEnvIf and then add the header accordingly:

您可以使用SetEnvIf然后相应地添加标头：

SetEnvIf Request_URI "\.php$" phpfile
Header set TestHeader "Sent from PHP" env=phpfile

If the request URL ends with the extension ".php", then SetEnvIf will set a variable "phpfile". If the variable "phpfile" exists only then TestHeader: Sent from PHP will be sent as a response header. You can use this logic for as many extensions or URL patterns as you need.

如果请求URL以扩展名“.php”结尾，则SetEnvIf将设置变量“phpfile”。如果变量“phpfile”仅存在，则TestHeader：从PHP发送将作为响应头发送。您可以根据需要将此逻辑用于尽可能多的扩展或URL模式。

Edit: If the header already exists i.e. it is sent from PHP, then using Header Set apache will replace it by the new value.

编辑：如果标头已经存在，即它是从PHP发送的，那么使用Header Set apache将用新值替换它。

#1