htaccess 301重定向为良好的seo和动态网址

Question

i am planning to change my site urls and i dont want my old links which they allready indexed in google to be gone so i want to use this way to do and i am not sure about it.

i want to to redirect those links

http://domain.com/usa/mobiles-phones-pdas/ad/162/mobile-for-sale
http://domain.com/usa/mobiles-phones-pdas/mobile-phones/ad/162/mobile-for-sale
http://domain.com/usa/mobiles-phones-pdas/mobile-phones/blackberry/ad/162/mobile-for-sale

to be redirected to this url

http://domain.com/usa/ads-162.html

also the country ( usa ) it is not stick so it could be another country but the links are the same.

so which is the best SEO redirection method to keep my old links in google indexed.

regards

Answer 1

This should work for you

RewriteRule ^([^/]+)/.+?/ad/([0-9]+).+$ /$1/ads-$2.html [R=301,L]