mod_env
Modifies the environment which is passed to CGI scripts and SSI pages
Base
mod_env.c
env_module

This module allows for control of internal environment variables that are used by various Apache HTTP Server modules. These variables are also provided to CGI scripts as native system environment variables, and available for use in SSI pages. Environment variables may be passed from the shell which invoked the httpd process. Alternatively, environment variables may be set or unset within the configuration process.

Environment Variables
SetEnvIf
PassEnv
Passes environment variables from the shell
PassEnv env-variable [env-variable] ...
server config
virtual host
directory
.htaccess
FileInfo

Specifies one or more native system environment variables to make available as internal environment variables, which are available to Apache HTTP Server modules as well as propogated to CGI scripts and SSI pages. Values come from the native OS environment of the shell which invoked the httpd process.

# Example

PassEnv LD_LIBRARY_PATH
SetEnv
Sets environment variables
SetEnv env-variable value
server config
virtual host
directory
.htaccess
FileInfo

Sets an internal environment variable, which is then available to Apache HTTP Server modules, and passed on to CGI scripts and SSI pages.

# Example

SetEnv SPECIAL_PATH /foo/bin

The internal environment variables set by this directive are set after most early request processing directives are run, such as access control and URI-to-filename mapping. If the environment variable you're setting is meant as input into this early phase of processing such as the RewriteRule directive, you should instead set the environment variable with SetEnvIf.

Environment Variables
UnsetEnv
Removes variables from the environment
UnsetEnv env-variable [env-variable] ...
server config
virtual host
directory
.htaccess
FileInfo

Removes one or more internal environment variables from those passed on to CGI scripts and SSI pages.

# Example

UnsetEnv LD_LIBRARY_PATH