I do not get the same. HTTP_HOST gives the same server name as I typed in the Location box of my browser. It can be 'localhost' for example.
SERVER_NAME is the same everytime, hostname + domain, as it is registered in the machine's configuration.

--
tune

In reply to Re: to $Env{'HTTP_HOST'} or to $Env{'SERVER_NAME'}, that is the question. by tune
in thread to $Env{'HTTP_HOST'} or to $Env{'SERVER_NAME'}, that is the question. by JK_Bean

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