modrewrite and duplicate pages in google

[cosmonaut]

I have a database of content. I use a template file to call details to populate the page

so things like this

domain.com/data.php?id=25

Historically I did use this structure.

I now use htaccess so that I actually call these pages using

domain.com/data/25

All good so far. But google is listing both urls in WMT and giving me a duplicate title error.

So what can I do? I'd like to redirect the former to the latter, but nothing I try seems to work. Any help greatly appreciated.

TIA Jules
thanks all

[lucy24]

Well, let's see what you've tried so far. Include details of what "doesn't work" means.

[g1smd]

As this is a topic that is asked at least once every week, there's hundreds of prior threads with example code. The last was just days ago.

You summise correctly that you need a redirect and a rewrite for the whole job. Both must be coded using RewriteRules. The devil is in the details.

[vincevincevince]

The key is to end the rewrite rule with the appropriate redirection, e.g. [R=301,L] in this case

[lucy24]

There will be two RewriteRules. One is a redirect. One is a rewrite. The second one is already in place, assuming that "now I use htaccess" means "now I rewrite requests for A to serve content from B".