Darren Kandekore

<p>Manage and clean up duplicate WordPress posts with ease. Delete duplicates in bulk, assign 301 redirects, and generate <code>.htaccess</code> rules — all from one simple interface.</p>
<h3>Features</h3>
<ul>
<li>Detect duplicate posts by <strong>title</strong> and <strong>slug</strong></li>
<li>Display all duplicates in a table (with checkboxes)</li>
<li>Per-post redirect options:</li>
<li>Choose from other duplicates in a dropdown</li>
<li>Enter a custom redirect URL manually</li>
<li>Validate redirect targets before deleting</li>
<li>Redirect deleted posts using 301 rules</li>
<li>Save posts to <strong>trash</strong>, not permanent delete</li>
<li>Generate <code>.htaccess</code> rules for all redirects</li>
<li>Copy/paste or export redirects as needed</li>
</ul>
<h3>How to Use</h3>
<ol>
<li>Go to <strong>Tools > Duplicate Post Manager</strong></li>
<li>Click <strong>Scan for Duplicates</strong></li>
<li>Review the table of duplicate posts</li>
<li>For each post:
<ul>
<li>Check the box to delete it</li>
<li>Choose a redirect target (dropdown or custom URL)</li>
</ul>
</li>
<li>Click <strong>Delete Selected & Redirect</strong></li>
<li>Scroll down to copy or export your <code>.htaccess</code> redirect rules</li>
</ol>
<h3>Redirect Format</h3>
<p>The plugin generates Apache <code>.htaccess</code> rules like:</p>
<p>Redirect 301 /old-slug /new-slug<br />
Redirect 301 /another-old /new-target</p>
<ul>
<li>All redirects use <strong>relative paths</strong> for portability.</li>
<li>Only valid (non-404) redirects are saved.</li>
</ul>
<h3>Why Use It?</h3>
<ul>
<li>Prevent SEO penalties from duplicate content</li>
<li>Control user redirection after cleanup</li>
<li>Maintain your site’s authority by preserving link equity</li>
<li>Clean and update old auto-imported posts or legacy content</li>
</ul>
<h3>Technical Notes</h3>
<ul>
<li>Uses WordPress core functions (<code>get_posts</code>, <code>get_permalink</code>, <code>wp_trash_post</code>)</li>
<li>Compatible with Classic Editor and Block Editor (Gutenberg)</li>
<li>Does not delete posts permanently</li>
<li>Nonce-verified form for security</li>
</ul>
<h3>License</h3>
<p>This plugin is licensed under the <a href="https://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">GPLv2</a> or later.</p>
<h3>Coming Soon (Ideas)</h3>
<ul>
<li>Export <code>.htaccess</code> as a downloadable file</li>
<li>Custom post type support</li>
<li>Integration with Redirection plugins</li>
<li>Inline AJAX validation of manual URLs</li>
</ul>
<h3>Author</h3>
<p><a href="https://darrenk.uk/" rel="nofollow ugc">Darren Kandekore</a></p>


Kandeshop Duplicate Post Manager

Manage and clean up duplicate WordPress posts with ease. Delete duplicates, assign 301 redirects, and generate .htaccess rules.

Mark Allen

<p>This is a filter for the FeedWordPress plugin. <strong>If you don’t use FeedWordPress this plugin will not be useful to you.</strong></p>
<p>I wrote this filter after seeing the same post in my database 32 times.  Maybe you’ve had the same problem, and I hope this filter helps you solve it.</p>
<p>The filter works by hooking the “syndicated_post” action of FeedWordPress and the “save_post” action in the core of WordPress.</p>
<p>For each potential post from a feed, the plugin attempts to find an identical SHA1 hash of the first 1024 non-whitespace characters (stripped of HTML tags) of the post content.<br />
If it finds a match the post is skipped. If not, the post is processed and a hash is inserted into the post’s metadata. (Stored as key _dpf.)</p>
<p><strong>NOTE:</strong> No filter is going to be 100% accurate.  This filter will stop <em>most</em> or <em>some</em> duplicates, but in all likelihood, will not stop <em>all</em> of them.<br />
If you want a filter that stops <em>all</em> duplicates, this isn’t your solution. In my test installation I had 5 posted duplicates out of<br />
125 syndicated posts (4% false negative) out of a corpus of about 300 duplicates. Most of those false negatives were due to slightly different HTML markup<br />
in the post content itself. So my approach isn’t perfect, but it is “good enough” for me.</p>
<h3>Important Note</h3>
<p>This filter can only check future syndication posts.  Whatever duplicates are already present in your WordPress installation you’ll have to remove/clean-up on your own.</p>
<h3>License</h3>
<p>Copyright (C) 2012 by Mark R. Allen<br />
All rights reserved.</p>
<p>Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:</p>
<ul>
<li>Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.</li>
<li>Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.</li>
<li>Neither the name of Mark Allen nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.</li>
</ul>


FeedWordPress Duplicate Post Filter

A FeedWordPress syndicated post filter that checks for duplicates before posting items from your feeds.

Kandeshop Duplicate Post Manager vs FeedWordPress Duplicate Post Filter