Variables

The core module supports built-in variables, whose names correspond with the names of variables in Apache.

First of all, there are the variables, which represent the lines of the title of the client request, for example, $http_user_agent, $http_cookie, and so forth.

Furthermore, there are other variables:

This variable contains the value of the GET request variable PARAMETER if present in the query string

This variable is equal to arguments in the line of request;

The address of the client in binary form;

(undocumented)

This variable is equal to line Content-Length in the header of request;

This variable is equal to line Content-Type in the header of request;

The value of the cookie COOKIE;

This variable is equal to the value of directive root for the current request;

The same as $uri.

This variable is equal to line Host in the header of request or name of the server processing the request if the Host header is not available.

This variable may have a different value from $http_host when the Host input header is absent or has an empty value.

The value of the HTTP header HEADER when converted to lowercase and with ‘dashes' converted to ‘underscores', e.g. $http_user_agent, $http_referer…;

Evaluates to “?” if $args is set, “” otherwise.

This variable allows limiting the connection rate.

The same as $args.

The address of the client.

The port of the client;

This variable is equal to the name of user, authenticated by the Auth Basic Module;

This variable is equal to path to the file for the current request, formed from directives root or alias and URI request;

This variable(0.7.58+) contains the body of the request. The significance of this variable appears in locations with directives proxy_pass or fastcgi_pass.

Client request body temporary filename;

(undocumented)

This variable is equal to the method of request, usually GET or POST.