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Editorial Team
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Asked: 2026-05-20T21:54:36+00:00

I want to get the domain name for where the script is running. How

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I want to get the domain name for where the script is running. How can that be done with PHP?
I see that $_SERVER['HTTP_HOST'] as well as $_SERVER['SERVER_NAME'] contain this information.
Will that variable always work and should I use one over the other?

Thank you.

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1 Answer

  1. Editorial Team

    Similar question has been asked in stackoverflow before.

    See here: PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?

    Also see this article: http://shiflett.org/blog/2006/mar/server-name-versus-http-host

    Recommended using HTTP_HOST, and
    falling back on SERVER_NAME only if
    HTTP_HOST was not set. He said that
    SERVER_NAME could be unreliable on the
    server for a variety of reasons,
    including:

    • no DNS support
    • misconfigured
    • behind load balancing software

    Source:
    http://discussion.dreamhost.com/thread-4388.html

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