ENV -- 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 Command And CGIScripts are running in.

If an environment variable is undefined (as against being set to the empty string) it will be returned as not set.

Note: For security reasons, only those environment variables whose names match the regular expression in the configuration setting {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.

Examples

• %ENV{MOD_PERL}% displays as: not set

Related

HTTP_HOST, REMOTE_ADDR, REMOTE_PORT, REMOTE_USER