Dynamic URL Redirection

[eiffel76]

I have several pages that are dynamically generated, but lead to the same page. I.e.:

product_info.php?manufacturers_id=11&products_id=727
product_info.php?cPath=199_28_195&products_id=727
product_info.php?products_id=727

As far as I can tell, Search Engines will see this as duplicate content. I'd like all pages to go to: product_info.php?products_id=727

After much searching, it appears that "RewriteCond" and "RewriteRule" in an .htaccess can take "product_info.php" and turn it into "product_info.php?products_id=727", but as far as I can tell, they don't do what I'd like to do. - In general, they don't seem to do much with dynamic urls. (And people who try end up finding out the script does nothing noticeable. - For the interested parties: http://answers.google.com/answers/threadview?id=587953 - no conclusion to this thread yet, and I tried the examples with no success)

It appears "RedirectMatch" does not work with dynamic URLs. (The default Cpanel method)

If apache can't, can a PHP (or other language) script do this?

Too much searching for this guy...
Thanks in advance!

 

[eiffel76]

I got help. Here's the working code:

RewriteEngine on

RewriteCond %{QUERY_STRING} ^.+products_id=([0-9]+)$ [NC]
RewriteRule ^product_info\.php$ domain_here/product_info.php?products_id=%1 [R=301,L]

For higher education on mod_rewrite, I found the following pages helpful:

http://www.webhelpinghand.com/htaccess_rewrite.htm

http://www.webforgers.net/mod-rewrite/mod-rewrite-syntax.php

http://etext.lib.virginia.edu/services/helpsheets/unix/regex.html

 

[eiffel76]

Credit goes to jharnois at mod_dev_shed

http://forums.devshed.com/apache-development-15