PHP:$ _ SERVER ['REDIRECT_URL']与$ _SERVER ['REQUEST_URI'] [英] PHP: $_SERVER['REDIRECT_URL'] vs $_SERVER['REQUEST_URI']

问题描述

我打印了$ _SERVER，发现$ _SERVER['REDIRECT_URL']与$_SERVER['REQUEST_URI']都具有相同的值.两者有什么区别?

I printed $_SERVER, and I found out that $_SERVER['REDIRECT_URL'] vs $_SERVER['REQUEST_URI'] both have same values. What's the difference between the two?

推荐答案

REQUEST_URI 是在HTTP请求行.内部重定向发生时， REDIRECT_URL 由Apache 创建:

REQUEST_URI is the requested URI path and query as used in the HTTP request line. REDIRECT_URL is created by Apache when an internal redirect happens:

REDIRECT_环境变量是根据重定向之前存在的环境变量创建的.它们使用REDIRECT_前缀重命名，即HTTP_USER_AGENT变为REDIRECT_HTTP_USER_AGENT.

REDIRECT_ environment variables are created from the environment variables which existed prior to the redirect. They are renamed with a REDIRECT_ prefix, i.e., HTTP_USER_AGENT becomes REDIRECT_HTTP_USER_AGENT.

REDIRECT_URL，REDIRECT_STATUS和REDIRECT_QUERY_STRING，并且只有在错误条件之前存在其他标头时，才会设置其他标头.

REDIRECT_URL, REDIRECT_STATUS, and REDIRECT_QUERY_STRING are guaranteed to be set, and the other headers will be set only if they existed prior to the error condition.

请注意， REDIRECT_URL 仅包含URI路径.

Note that REDIRECT_URL does only contain the URI path.

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