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Duplicate Content Cure Plugin for WordPress

written by John Chow on May 25, 2007

David Pitlyuk sent words about a WordPress plugin that will help get you out of Google’s Supplemental index. The Duplicate Content Cure Plugin for WordPress is a very simple, yet effective SEO plugin that prevents search engines from indexing WordPress pages that contain duplicate content, like archives and category pages.

It does this by adding the meta tag on the problem pages. Installation is very simple.

1. Download the plugin
2. Place the file duplicate-content-cure.php in your plugins directory
3. By default, category pages will have the noindex tag added. If you wish to allow your category paes to be indexed, just change the $index_category_pages variable in the duplicate-content-cure.php file. See the example below:

Change
$index_category_pages = false;
to
$index_category_pages = true;

4. activate it on the plugins page

That’s it. Say goodbye to those pesky duplicate content pages for good.

The plugin won’t replace a good robots.txt file but it’s very easy to use and will eliminate the biggest cause of duplicate content on a WordPress blog.

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{ 34 comments }

Daniel May 25, 2007 at 9:33 am

All of these plugins are getting out of hand :)

InvestorBlogger May 25, 2007 at 10:18 am

I know … I can no longer keep up with even the smallest percentage. And it’s getting harder to choose which ones to ditch or keep!

Mubin May 25, 2007 at 10:36 am

John, wont this lead to the categories pages not getting any pr than?

Dave May 25, 2007 at 11:07 am

Yes, but it can easily be made so that it does not block your category pages.

$index_category_pages = false;
to
$index_category_pages = true;

In the plugin edit.

John Chow May 25, 2007 at 11:25 am

Your categories pages are all dupe content anyways.

Make Money Blogging May 29, 2007 at 1:32 am

Exactly, there’s no reason to include category pages in Google (or other search engines) since they offer nothing of additional use to the SERPs.

Wahlau.NET May 29, 2007 at 6:51 am

I agree…the next upgrade, you will be deactivating all and activating all plugins…wait..there is a function to deactivate all…hail wordpress

Nomar May 30, 2007 at 2:36 am

This is interesting, I should check it for my own blog

Dy (www.dyphan.com) May 25, 2007 at 9:58 am

I love them!

Law of Attraction May 25, 2007 at 12:26 pm

nice !! I guess I have to switch to WP soon

Hari May 25, 2007 at 10:04 am

That looks like a nice plugin. I gonna install it on my new blog : http://gotchance.com

Best Airmiles Deals May 25, 2007 at 10:11 am

This is EXACTLY the reason why I love Wordpress.

InvestorBlogger May 25, 2007 at 10:19 am

Wow! I checked my supplementals just now, it’s over 50% of my pages! Yikes. I need to do something soon, to get this right!

And voila! This plugin is available. I got it downloaded. Trying it tomorrow!

Kenneth

Cheap International Calls from UK May 25, 2007 at 10:47 am

Hey John, thanks for this! I’m trying to design a site using drupal but I’m being pushed further and further to use wordpress instead as it’s so much easier!! Do you know how I’d be able to use wordpress as a CMS instead of a blog??

John Chow May 25, 2007 at 12:34 pm

It is possible to use Wordpress as a CMS. Both http://www.hardcoreware.net and http://www.thinkgaming.org are powered by wordpress.

Player Lifestyle June 10, 2007 at 12:39 pm

Done! :mrgreen:

SEO Blog May 25, 2007 at 11:15 am

Actually I think it’s much easier to disallow the G bot to browse most of your blog parts (categories, tags, pages) and allow it to crawl only the Archive. By doing so I think it’s possible to reduce the supplemental results a lot. I put a new robots.txt on yesterday and today I already have 60 pages less in the supplemental results than yesterday.

website copywriter May 25, 2007 at 11:19 am

Another plug-in to the rescue — thanks for the tip, John!

Patches and hacks May 25, 2007 at 11:52 am

I actually created a plugin that adds tag pages in google sitemap. Now after all these discussions about eliminating duplicate content I can see that my plugin is kind of useless and should not be used, but the google sitemap plugin still includes the category pages in the sitemap. Maybe it should not do that.

Patches and hacks May 25, 2007 at 12:00 pm

I just noticed that there are options you can set so that the google sitemaps plugin will not include categories and archives in your sitemap.

Fashion Industry Ceo May 25, 2007 at 12:23 pm

These plugins are getting out of hand…too many of them!.

website copywriter May 25, 2007 at 1:32 pm

There can never be enough plug-ins in the world…

Chicago 2016 May 25, 2007 at 4:04 pm

Yeah, Wordpress is really useful. Thanks for posting this!

Jenny May 25, 2007 at 5:18 pm

Interesting. I should give this a run and see if it works good.

Ronaldo Camacho May 25, 2007 at 6:11 pm

I prefer to use the robots.txt, it’s one less plugin to care about.

InvestorBlogger May 25, 2007 at 7:24 pm

I’m using it now, AND the robots.txt! Wonder if that’s overkill.

anyway. I checked to see if it’s working – there’s nothing to configure and no sign other than in plugins directory that it is working so to make sure I went to a category and opened the source code. Did a quick check for the noindex code. Sure it is there.

Don’t know if it will make a difference, currently 52% of my pages are in supplementals.

Mmm. let’s see.

Ronaldo Camacho May 25, 2007 at 7:51 pm

If you use Feedburner there’s yet another feature to ensure Google doesn’t index the feeds: activating NoIndex in the Publicizing tab.

InvestorBlogger May 26, 2007 at 8:23 am

That’s a good tip! Mm. I’ll do that right away.

Wallet Rehab - Ways to save money May 26, 2007 at 10:21 pm

Awesome. This is great for those of us who have too many sites to keep updating the robots.txt file.

Alan Rimm-Kaufman May 28, 2007 at 3:10 am

Another approach is use snippets on the category and tag pages, reserving the full post for the dedicated post page itself.

That puts interesting mashups of snippet contents on category and tag pages, indexable by the spiders.

As is usually the case, consider what is best for your readers first, and for G second.

Cheers

alan

Vishal May 28, 2007 at 10:56 am

My site doesn’t contain duplicate pages but still most of the pages comes in supplemental results. Can anyone help!!
Thank You

Don@AffiliateWatcher May 28, 2007 at 11:07 am

Another excellent plugin. My plugin folder is growing quickly here lately. Pretty soon, I’m going to need a Plugin to handle my Plugins!

:arrow: Don

shaun June 10, 2007 at 5:40 pm

Excellent plug-in I didn’t even know this existed. I’m sure this plugin will get a lot of installs since you made this post :smile:

Matt - Domain Feed June 12, 2007 at 12:50 pm

John you must have a zillion plugins by now. Do they start to slow down wordpress after awhile?