PHP：$_SERVER['REDIRECT_URL'] 与 $_SERVER['REQUEST_URI']
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PHP: $_SERVER['REDIRECT_URL'] vs $_SERVER['REQUEST_URI']
提问by evilReiko
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?
我打印了 $_SERVER，我发现 $ _SERVER['REDIRECT_URL']vs$_SERVER['REQUEST_URI']两者具有相同的值。两者有什么区别？
回答by Gumbo
REQUEST_URIis the requested URI path and query as used in the HTTP request line. REDIRECT_URLis created by Apachewhen an internal redirect happens:
REQUEST_URI是请求的 URI 路径和在HTTP 请求行中使用的查询。REDIRECT_URL是在发生内部重定向时由 Apache 创建的：
REDIRECT_environment variables are created from the environment variables which existed prior to the redirect. They are renamed with aREDIRECT_prefix, i.e.,HTTP_USER_AGENTbecomesREDIRECT_HTTP_USER_AGENT.
REDIRECT_URL,REDIRECT_STATUS, andREDIRECT_QUERY_STRINGare guaranteed to be set, and the other headers will be set only if they existed prior to the error condition.
REDIRECT_环境变量是从重定向之前存在的环境变量创建的。它们用REDIRECT_前缀重命名，即HTTP_USER_AGENT变成REDIRECT_HTTP_USER_AGENT。
REDIRECT_URL,REDIRECT_STATUS, 和REDIRECT_QUERY_STRING保证被设置，并且其他标头只有在错误条件之前存在时才会被设置。
Note that REDIRECT_URLdoes only contain the URI path.
请注意，REDIRECT_URL仅包含 URI 路径。
回答by Sjoerd
$_SERVER['REDIRECT_URL']is only available on some servers in some cases. Use $_SERVER['REQUEST_URI']instead.
$_SERVER['REDIRECT_URL']在某些情况下仅在某些服务器上可用。使用$_SERVER['REQUEST_URI']来代替。
回答by Jan Salák
REQUEST_URI also changes special chars like spaces to "%20" etc.
REQUEST_URI 还将特殊字符（如空格）更改为“%20”等。
