Question

Breaking my head on this one..

Need to check if a get variable named ‘filter’ has value or not with mod_rewrite..

• http://site.com/audio/speakers?filter= should redirect to: http://site.com/audio/speakers
• http://site.com/audio/speakers?filter=yes shouldn’t redirect..

Thanks!

Answer 1

You can try this:

RewriteCond %{QUERY_STRING} ^filter=$ [NC]
RewriteRule ^audio/speakers$ http://site.com/audio/speakers? [R=302,L]

It will only check for this URL: /audio/speakers?filter= (where filter is first and only one parameter and is empty) — exactly like in your URL example. If there will be more than one parameter .. it will not match and will not do anything (even if filter will be empty).

You can change redirect code form 302 (temp) to 301 (permanent) if required.

UPDATE:

RewriteCond %{QUERY_STRING} ^filter=$ [NC]
RewriteRule ^(.*)$ http://site.com/$1? [R=302,L]