redirect if url contains specific string using htaccess

Question

I want to redirect to different domain, 83answers.com if url contains forum string.

Like if my url is test.guru99.com/forum/xyxyxzz<

Answer 1

For the base URL, you don't need RewriteCond, just RewriteRule:

RewriteRule forum http://83answers.com [R,L]

For the query string, you were almost there:

RewriteCond %{QUERY_STRING} forum
RewriteRule .? http://83answers.com [R,L]

The combined rules:

RewriteRule forum http://83answers.com [R,L]

RewriteCond %{QUERY_STRING} forum
RewriteRule .? http://83answers.com [R,L]

Note that you must include http://. If you just use 83answers.com, the server tries to redirect to a URL on your server. For example, it would redirect http://test.guru99.com/forum/xyxyxzz to http://test.guru99.com/83answers.com, which is no good.