I'm trying to redirect to a URL if a test for a module passes.

Something like this (Which doesn't seem to work for me.)

Perhaps this just isn't possible. Anyone?

<IfModule mod_rewrite.c>
    <ifModule mod_gzip.c>
        RewriteEngine On
        RewriteRule ^/mod_gzip/?$ mod_gzip-is-enabled.php

Nested <IfModule> containers are not your problem (yes, this is possible). (But is the outer <IfModule mod_rewrite.c> container necessary?)

Your problem is the RewriteRule pattern ^/mod_gzip/?$:

RewriteRule ^/mod_gzip/?$ mod_gzip-is-enabled.php

This will never match in a per-directory .htaccess context, because of the slash prefix on the RewriteRule pattern. You need to remove it, like so:

RewriteRule ^mod_gzip/?$ mod_gzip-is-enabled.php [L]

In order to match a requested URL of the form /mod_gzip/ (or /mod_gzip).

In per-directory .htaccess files, the URL-path that the RewriteRule pattern matches against is less the directory-prefix, which notably ends with a slash. So the URL-path that is matched never starts with a slash. (This differs from when the directives are used in a server or virtualhost context.)

Also, you should probably include the L flag in case you have other directives.

  • "But is the outer <IfModule mod_rewrite.c> container necessary?" Well I figured it was because if mod_rewrite.c isn't available then Rewrite atempts would fail(?) I tried your code but visiting [domain].com/mod_gzip is just redirecting to / as if mod_gzip-is-enabled.php doesn't exist (Which it does.) – Jay Mar 21 '18 at 22:04
  • Whether the outer <IfModule> that checks for mod_rewrite is required is dependent on whether the ability to rewrite the URL is mandatory or not? If you are OK with the process silently failing regardless of whether mod_gzip is enabled then keep the check for mod_rewrite. If you are seeing a "redirect to /" then something else is triggering that - there is no "redirect" here, it's an internal rewrite. (If mod_gzip-is-enabled.php didn't exist and this directive was executed then you'd expect to see a 404.) Do you have other directives in your .htaccess file (or server config)? – MrWhite Mar 26 '18 at 11:47

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