REMOTE_USER -- environment variable

Examples

• %REMOTE_USER% expands to
  Displays the user identity established by the Web Server. Not available when using Template Autentication. The REMOTE_USER variable only expands when the active script is configured to Require valid-user in the Apache configuration. Eg. If your site uses Apache authentication and allows guest access, view this page with bin/view and bin/viewauth to see the effect.