Redirect According To Specific Query String Parameter

My blog's sitemap was incorrectly showing tag urls of this format:
http://mysite.com/blog/index.php?tag=example

In reality, the tag urls are of this format:
http://mysite.com/index.php?tag=example

I've since corrected the sitemap generator so that its urls are of the correct format, but Google and friends have already indexed some of the bad urls. I'd like to redirect bad url to good url while preserving the query string.

I tried a number of things, and this is what makes the most sense to me, but doesn't work:
RewriteRule ^blog/index\.php\?$ index.php? [R=301,QSA,L]

Any suggestions? Thanks in advance!

Jacob

Try that and let me know if it works.. basically it checks to make sure that their IS a query string ?tag=example.. and if so it sends a 301 redirect to all requests for /blog/index.php?anything=anything to /index.php?anything=anything.

You could change this to only work for urls that have tag in the query string like this.

Produke,
You basically got it.

I needed your tag-specific suggestion but a straight copy&paste gave:



So I added an [L] to the last line:


That resulted in the desired redirect but the url was being rewritten incorrectly as:
http://mysite.com/index.phptag=example?tag=example

So there seemed to be a redundant query string call. What worked was:


Thanks alot! I really appreciate it. On topic - what would you say is the best way to design & test rewriterules? Any specific tool recommendations to speed things up?

What I do is I have a domain that I use only for testing mod_rewrite..

I don't use any tools.. I i get stumped I post to a forum like this :)