PHP:$ _SERVER变量:$ _SERVER ['HTTP_HOST']与$ _SERVER ['SERVER_NAME'] [英] PHP: $_SERVER variables: $_SERVER['HTTP_HOST'] vs $_SERVER['SERVER_NAME']

问题描述

可能重复:
HTTP_HOST与服务器名

Possible Duplicate:
HTTP_HOST vs. SERVER_NAME

$_SERVER['HTTP_HOST']和$_SERVER['SERVER_NAME'] ??

推荐答案

$_SERVER['SERVER_NAME']给出主机配置中定义的服务器名称的值(即Apache的Apache .conf文件).

$_SERVER['SERVER_NAME'] gives the value of the server name as defined in host configuration (i.e for Apache the Apache .conf file).

$_SERVER['HTTP_HOST']为您提供用于满足当前请求的域名，该域名与该请求更直接相关.

$_SERVER['HTTP_HOST'] gives you the domain name through which the current request is being fulfilled and is more directly related to the request.

HTTP_HOST通常在大多数应用程序中更有用，因为它直接与请求有关，而SERVER_NAME可以返回conf文件中的任何值，并且根本不告诉您有关该请求的任何信息.

HTTP_HOST is typically more useful in most applications in that it relates directly to the request, whereas SERVER_NAME could return whatever value is in the conf file and doesn't tell you anything about the request at all.

我将为您提供一个示例，说明HTTP_HOST与SERVER_NAME可能有何不同.假设您有一个在Apache中定义的主机，服务器名称为domain.com，IP地址为1.2.3.4.

I will give you an example of how HTTP_HOST might differ from SERVER_NAME. Say you have an host defined in Apache with ServerName of domain.com and an IP address of 1.2.3.4.

让我们看一下两个传入的请求URL，并显示这些变量之间的区别:

Let's look at two incoming request URL's and show the difference between these variables:

http://www.domain.com
HTTP_HOST = www.domain.com
SERVER_NAME = domain.com

http://1.2.3.4
HTTP_HOST = 1.2.3.4
SERVER_NAME = domain.com

同样，HTTP_HOST与请求的绑定更多，而SERVER_NAME由服务器配置确定.

So again, HTTP_HOST is tied more to the request, whereas SERVER_NAME is determined by server configuration.

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