htaccess. give a 410 error and redirect dynamic php page

Question

Google in error has indexed thousands of urls that are not in the sitemap.xml. These urls probably are considered as duplicate content (according to Google only).

I would need to deindex them fairly quickly. So would a 410 gone status would be handy.

in htaccess i would like to redirect

www.domain.com/page.php?bid=1&page=xxx
www.domain.com/page.php?bid=2&page=xxx
www.domain.com/page.php?bid=3&page=xxx
www.domain.com/page.php?bid=5&page=xxx
www.domain.com/page.php?bid=6&page=xxx
www.domain.com/page.php?bid=7&page=xxx
www.domain.com/page.php?bid=8&page=xxx
www.domain.com/page.php?bid=9&page=xxx

to this page

www.domain.com/page.php?bid=4&page=xxx

Answer 1

Place this code in your root .htaccess:

RewriteEngine On

RewriteCond %{QUERY_STRING} ^bid=[1-35-9]&page=([^&]+) [NC]
RewriteRule ^([^.]+\.php)$ /$1?bid=4&page=%1 [L,R=301]

301 (permanent redirect) will force Google to update its cached results.