如何让 php 页面返回 503 错误（或任何非 200 错误）
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How do I make php page return a 503 error (or anything non-200)
提问by benstpierre
A former developer wrote or client-server api in PHP. It simply sends messages as xml using post/response in a very simplistic fashion. The problem is that even when there is an error (ex: invalid arguments passed into the server side) we get a HTTP 200 response with a page like this
前开发人员用 PHP 编写或客户端-服务器 api。它只是以非常简单的方式使用 post/response 将消息作为 xml 发送。问题是，即使出现错误（例如：传递到服务器端的参数无效），我们也会收到 HTTP 200 响应，页面如下
<h4>Unknown error!</h4>
In firebug I can see that the actually HTTP response is a 200. How can we send a different response (ie:503) when we programatically detect in our php code that it is appropriate to do so.
在 firebug 中，我可以看到实际的 HTTP 响应是 200。当我们以编程方式在我们的 php 代码中检测到适合这样做时，我们如何发送不同的响应（即：503）。
回答by ssube
Use PHP's headerfunction to send the code (along with the HTTP version and any other headers you need). More complete info:
使用 PHP 的header函数发送代码（连同 HTTP 版本和您需要的任何其他标头）。更完整的信息：
When to send HTTP status code?
http://php.net/manual/en/function.header.php
http://php.net/manual/en/function.header.php
http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
header('HTTP/1.1 503 Service Temporarily Unavailable');
header('Status: 503 Service Temporarily Unavailable');
header('Retry-After: 300');//300 seconds
回答by Ben Racicot
I worked on a site that had been hacked and had to use HTACCESS to do this.
我在一个被黑客入侵的网站上工作，不得不使用 HTACCESS 来做到这一点。
<IfModule mod_rewrite.c>
RewriteEngine on
# let this (iescaped) IP address see the real site:
# RewriteCond %{REMOTE_ADDR} !^123.45.67.89
RewriteCond %{REQUEST_URI} !/maintenance.php$ [NC]
RewriteCond %{REQUEST_URI} !.(jpe?g?|png|gif|css|js) [NC]
RewriteRule .* /maintenance.php [R=503,L]
</IfModule>
回答by chelmertz
On top of your script (or really, before any output is sent as a response):
在您的脚本之上（或者实际上，在任何输出作为响应发送之前）：
<?php header("HTTP/1.0 404 Not Found");or any other HTTP status code.
<?php header("HTTP/1.0 404 Not Found");或任何其他HTTP 状态代码。
回答by Chris
A good class for achieving this can be found here: http://www.krisjordan.com/php-class-for-http-response-status-codes/- use it like this (before any other output):
可以在此处找到实现此目的的好类：http: //www.krisjordan.com/php-class-for-http-response-status-codes/- 像这样使用它（在任何其他输出之前）：
<?php header(StatusCodes::httpHeaderFor(503)); ?>
