Question

I have a url which ends with a certain variable string, and was erroneously generated and indexed unfortunately.

Example:
http://domain.com/anything-in-between/?var=xyz-abc-abc-abc

How can I redirect to main site (kill it), by detecting ‘abc-abc-abc’ using htaccess?

Why wouldn’t this work and what would be the best solution:

RewriteCond %{REQUEST_URI} abc-abc-abc
RewriteRule .* index.php

Answer 1

You want to use the query string as claesv suggests but you need to then kill the query string

RewriteEngine On
RewriteBase   /
RewriteCond %{QUERY_STRING} \bvar=.*?abc-abc-abc$
RewriteRule ^               index.php?           [L]

This will do it silently (i.e. in the server as an internal redirect and not involving the browser). You can’t use 301s reliably to trim query strings.