How to define a variable in apache's httpd.conf file?

Question

I want to define a variable in Apache server's httpd.conf configuration file.

Ex: variable static_path = C:\codebase\snp_static

and I want to use this variable (static_path) in httpd.conf where ever required.

Please tell me how can define a variable in httpd.conf file ?

Answer 1

Within httpd.conf, declare your variable(s) with: Define (Preferably at the very first line)
Syntax: Define variable-name variable-value

In this manner:

#The line below creates the variable [static_path] Define static_path C:/codebase/snp_static 

You can later use this variable like so:

ServerRoot = ${static_path} ... DocumentRoot = ${static_path} ... <Directory ${static_path}> ...etc. 

You can even combine multiple variables:

#Below, I am going to combine variables [server_space] and [static_path] Define server_space c:/ Define static_path codebase/snp_static ... ServerRoot = ${server_space}${static_path} ... DocumentRoot = ${server_space}${static_path} ... <Directory ${server_space}${static_path}> ...etc. 

Documentation: http://httpd.apache.org/docs/2.4/mod/core.html#define

Answer 2

If all you want is simple variable substitution inside httpd.conf, then define an ordinary shell environment variable for the user that runs Apache, then use the ${ENVVAR} syntax to refer to it inside your httpd.conf file, see Apache docs