htaccess 301 redirect — remove a string

Question

I am trying to do this htaccess 301 redirect, but I am stuck.

What I want is to remove a string in the URL, the string is: style=5&

I want the redirect it so all pages that may get that string in the URL will be removed. -- Thanks in advance.

FROM:

/viewtopic.php?style=5&f=45&t=1980&p=19136

TO:

/viewtopic.php?f=45&t=1980&p=19136

Answer 1

You can use this code in your DOCUMENT_ROOT/.htaccess file:

RewriteEngine On

RewriteCond %{QUERY_STRING} ^(.+?&)?style=5(?:&(.*))?$ [NC]
RewriteRule ^viewtopic\.php$ %{REQUEST_URI}?%1%2 [R=302,NC,L]