Tom Worster wrote:
On 9/13/09 10:24 PM, "Tommy Pham" <tommy...@yahoo.com> wrote:
--- On Sun, 9/13/09, Tom Worster <f...@thefsb.org> wrote:
From: Tom Worster <f...@thefsb.org>
Subject: [PHP] server name that the user agent used
To: "PHP General List" <php-general@lists.php.net>
Date: Sunday, September 13, 2009, 8:21 PM
when using apache with one vhost that
responds to a few different hostnames,
e.g. domain.org, y.domain.org, x.domain.org, let's say the
vhost's server
name is y.domain.org and the other two are aliases, is
there a way in php to
know which of these was used by the user agent to address
the server?
Did you see what comes up with php_info() for
$_SERVER["SERVER_NAME"] or $_SERVER["HTTP_HOST"] ?
SERVER_NAME returns whatever apache has as the vhost's configured server
name.
the php manual says of HTTP_HOST: "Contents of the Host: header from the
current request, if there is one." in which the last 4 words are a little
off-putting. but:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.23
i much more encouraging. the field is mandatory and should have what i'm
looking for. it's absence is cause for a 400. casual testing (with a modern
non-ie browser) seems to bear this out.
so i'll try using that with fallback to my current techniques if i don't
find a good value in HTTP_HOST.
The reason that it might not be available is that PHP is not always
running in a web context. $_SERVER['HOST_NAME'] would have no meaning,
for instance, in the CLI SAPI.
However, if running under a web SAPI, and if the web server provides the
info, PHP will pass it on to its scripts.
Regards,
Torben
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