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Asked: 2026-05-23T09:15:39+00:00

I printed $_SERVER, and I found out that $ _SERVER[‘REDIRECT_URL’] vs $_SERVER[‘REQUEST_URI’] both have

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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?

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  1. Editorial Team

    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_ 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.

    Note that REDIRECT_URL does only contain the URI path.

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