Re: server name that the user agent used

On 9/13/09 10:24 PM, "Tommy Pham" <tommyhp2@yahoo.com> wrote: > --- On Sun, 9/13/09, Tom Worster <fsb@thefsb.org> wrote: > >> From: Tom Worster <fsb@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.