How should I handle all of this duplicate content?

The site has Joomla. It has event_booking, which allows people to sign up for classes. Google indexed the class pages. Every page is the same except the date. I need to get those o开发者_JS百科ut of the index.

The URL's are of the form:

http://www.example.com/index.php?option=com_dtregister&controller=event&task=options&Itemid=0&eventId=1377

How do I 301 redirect those to this real page that is already indexed:

http://www.example.com/register-class

Or should I fix the duplicate content some other way?

Use <link rel="canonical" href="REAL_URL_HERE"/> for duplicated dynamic content.

Useful links:

• http://www.google.com/support/webmasters/bin/answer.py?answer=139394
• http://googlewebmastercentral.blogspot.com/2009/02/specify-your-canonical.html

Unfortunately I cannot say if you should also use 301 redirect for such duplicated URLs or not -- the question is not clear enough on what other duplicated URLs you have.

UPDATE: This rule will redirect (301 Permanent Redirect) all 3 URLs (only those, EXACT match) provided in comments to http://www.example.com/register-class

RewriteEngine On
RewriteBase /

RewriteCond %{QUERY_STRING} =controller=validate&task=email&no_html=1&eventId=1339 [OR]
RewriteCond %{QUERY_STRING} =controller=validate&task=email&no_html=1&eventId=1332 [OR]
RewriteCond %{QUERY_STRING} =controller=validate&task=email&no_html=1&eventId=1382
RewriteRule ^rider-training-course-registration$ http://www.example.com/register-class? [NC,R=301,L]

This one will redirect the URL from Question to the same target URL (add it below aforementioned):

RewriteCond %{QUERY_STRING} =option=com_dtregister&controller=event&task=options&Itemid=0&eventId=1377
RewriteRule ^index\.php$ http://www.example.com/register-class? [NC,R=301,L]

These rules need to be placed in .htaccess in website root folder. If placed elsewhere some tweaking may be required.