: ErrorDocument in dynamic SubFolder I host different Websites in 1 web space. But I don't want to give the ErrorDocument an absolute SubFolder name. Is it possible to make website a variable?

@Ann8826881

Server version: Apache/2.4.12 (Win32)





Is it possible to make website a variable?


Not before Apache 2.4.13 unfortunately.


Can .htaccess auto detect the SubFolder (including SubFolder depth)?


This depends on the module you are using in .htaccess, rather than .htaccess itself. For instance, mod_rewrite (when used in a per-directory context) works relative to the directory in which it is contained and can be used to extract the subdirectory path from the URL. ErrorDocument is a core directive, paths are relative to the DocumentRoot.

If you were on Apache 2.4.13+ then... from the Apache docs for ErrorDocument:


From 2.4.13, expression syntax can be used inside the directive to produce dynamic strings and URLs.


Which means you could do "something like" this:

# Assign the subdirectory to an environment variable
# Note the slash prefix is excluded from the captured pattern
RewriteCond %{REQUEST_URI} ^/([^/]+)/
RewriteRule ^ - [E=SUBDIR:%1]

# Set ErrorDocument dynamically to this subdirectory
# Requires Apache 2.4.13+
# The 2nd argument to the ErrorDocument directive must be prefixed with a slash
# in the source code itself for it to be interpreted as a local path.
ErrorDocument 404 /%{reqenv:SUBDIR}/e404.php


Alternative - Subdomains

An alternative, that would work on all versions of Apache, is to use subdomains instead of subdirectories. The subdomain can point to the subdirectory if you wish, but you would need to access the site through the subdomain.

The important thing with the subdomain is that the document root changes. So your ErrorDocument directive can be kept simple:

ErrorDocument 404 /error?error=404


The path (starting with a slash) is relative to the DocumentRoot.

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@Jamie184

People often forget about using symlinks. You can create a symlink for each site that points to a single directory. This means that a relative URI of /error/error404.html can all point to the same directory/file even outside of the/any web root.

This answer on another SE site covers the topic enough to get started: askubuntu.com/questions/56339/how-to-create-a-soft-or-symbolic-link

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