Relative path variables in .htaccess

Question

If I have an .htaccess file in a given directory within my website, and want to specify an ErrorDocument relative to the .htaccess file, NOT relative to the document root, is this possible?

Something like: ErrorDocument 404 $CURRENT_DIRECTORY/404.php

Answer 1

While a number of directives are sensitive to relative directory while within an .htaccess or <Directory> context, ErrorDocument is not. Per the documentation:

URLs can begin with a slash (/) for local web-paths (relative to the DocumentRoot), or be a full URL which the client can resolve.

Answer 2

You could create a "master" 404.php that's used for all 404s, then within that file include the specific 404.php using a path determined by the request, an environment variable (set with SetEnv), etc.