ENV{"varname"} -- inspect the value of an environment variable

  • Returns the current value of the environment variable in the CGI (Common Gateway Interface) environment. This is the environment that the TWiki scripts run in on the web server.
  • Note: For security reasons, only those variables whose names match the regular expression in {AccessibleENV} in the Security Settings/Miscellaneous section of configure can be displayed. Any other variable will just be shown as an empty string, irrespective of its real value.
  • Example: %ENV{MOD_PERL}% displays as: mod_perl/2.0.12
  • If a variable is undefined (as against being set to the empty string) it will be returned as not set.
  • Category: SystemInformationVariables
  • Related: HTTP_HOST, REMOTE_ADDR, REMOTE_PORT, REMOTE_USER
Edit | Attach | Watch | Print version | History: r2 < r1 | Backlinks | Raw View | More topic actions
Topic revision: r2 - 12 Nov 2012 - TWikiContributor
 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 1999-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback
Note: Please contribute updates to this topic on TWiki.org at TWiki:TWiki.VarENV.