is it possible to do the htaccess SetEnv with %{HTTP_HOST}?
i try it like this:
SetEnv HOSTNAME %{HTTP_HOST}
but this doesen't work. i tested it with setting it like
SetEnv HOSTNAME localhost.work
and thats working. So it's just my configuration whats not really operating.
Hope someone can give me a quick hint why this isn't working.
Thanks in advance.
SetEnv (mod_env) is for setting simple hardcoded name/value pairs. You need to use SetEnvIf (mod_setenvif) if you want to set the var based on elements of the request.
For example, to set the env var HOSTNAME to the value of the Host HTTP request header:
SetEnvIf Host "(.*)" HOSTNAME=$1
The SetEnvIf directive sets the environment variable conditionally... if the regex ((.*)) matches the the first argument (ie. the HTTP Host header) then it sets the env var.
Host refers to the Host HTTP request header (the same as the HTTP_HOST server variable). (.*) is the capturing regex that this matches against and $1 is a backreference to this captured pattern.
Reference:
https://httpd.apache.org/docs/2.4/mod/mod_setenvif.html#setenvif