PHP: $_SERVER ['REDIRECT_URL' ] 对比 $_SERVER ['REQUEST_URI' ]

Question

我打印了 $_SERVER，发现 $_SERVER['REDIRECT_URL'] 与 $_SERVER['REQUEST_URI'] 的值相同。两者有什么区别？

Answer 1

REQUEST_URI 是 HTTP request line 中使用的请求 URI 路径和查询。 . REDIRECT_URL is created by Apache当内部重定向发生时:

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, 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 只包含 URI 路径。