When I changed my WordPress permalinks, I started getting many 404 errors from Google Webmaster Tools. This is because Google still had the old permalink of this blog. I changed my permalink from:
/%category%/%post_name%/%id%to just:
%post_name%since it is a more search-engine-friendly URL.
I was getting around 400 pages showing 404 errors. After looking for solutions on the web, what I needed was to redirect all old URLs to the new permalink. I found the smart way to do this using htaccess. Thanks to Yoast.com for making a very handy script to generate the 301 redirects in htaccess. You can generate it here.
And here is my htaccess sample:
RewriteEngine On
RewriteBase /
RedirectMatch 301 ^/([^/]+)/([^/]+)/(d+)/$ http://www.ivankristianto.com/$2
RedirectMatch 301 ^/([^/]+)/([^/]+)/([^/]+)/(d+)/$ http://www.ivankristianto.com/$3
RedirectMatch 301 ^/(d+)/(d+)/([^/]+)/$ http://www.ivankristianto.com/$3Now all my old permalinks will automatically redirect to new permalinks with that simple trick.
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