PHP get domain name

Question

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

User · Answer

To answer your question  these should work as long as    Your HTTP server passes these values along to PHP  I don t know any that don t  You re not accessing the script via command line  CLI    But  if I remember correctly  these values can be faked to an extent  so it s best not to rely on them   My personal preference is to set the domain name as an environment variable in the apache2 virtual host     Virtual host setEnv DOMAIN NAME example com   And read it in PHP      PHP echo getenv DOMAIN NAME     This  however  isn t applicable in all circumstances

User · Answer

Similar question has been asked in stackoverflow before    See here  PHP   SERVER   39 HTTP HOST  39   vs    SERVER   39 SERVER NAME  39    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

[php] PHP get domain name

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