This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Related Links

Description

Related Links gives you the possibility to manually link other posts to your current post. But you can also link pages, media or any custom post-type. And in addition you can use custom urls to link to external files. The plugin adds a Metabox to the writing page with a list of all available content.

Features:

  • Shows a list of all available content in a Metabox on the writing page
  • Multiple links can be selected
  • Link order can be changed through drag and drop
  • Custom URLs can be added
  • Search field to quickly find a link
  • Simple theme integration with an included widget or related_links()
  • Works with custom post-types
  • Settings to enable the post-types that should be shown in the Metabox

Screenshots

  • Related links Metabox on the post page.
  • Settings page.

Installation

  1. Upload the related-links folder to the /wp-content/plugins/ directory.
  2. Activate the plugin through the Plugins menu in WordPress.
  3. Set in the link types in Related Links under the Settings menu in WordPress.
  4. Place <?php related_links(); ?> in your templates.

FAQ

How do I show the links in my theme?

Use the Related Links widget to show a list of the related links.

How do I show the links in a specific template?

Use the related_links() function directly in your template files. This will return an unordered list with an <ul> wrapper. Use this code for example in your `content.php’ template:

<?php related_links(); ?>
How can I modify the output of the link list?

You need to use the get_related_links() function. A simple example that shows a list with all link names and the type of link:

<?php $related_links = get_related_links(); ?>
<ul>
    <?php foreach ($related_links as $link): ?>
        <li><a href="<?php echo $link['url']; ?>"><?php echo $link['type']; ?>: <?php echo $link['title']; ?></a></li>
    <?php endforeach; ?>
</ul>
What are the properties returned by the `get_related_links()` function?

The get_related_links() returns an array containing every related link. when you loop through this array every link consists of another array with the following keys:

  • key id: equals to $post->ID or null for custom links
  • key url: equals to get_permalink() or the manually entered url of a custom link
  • key title: equals to $post->post_title or the manually entered title of a custom link
  • key type: the $post->post_type or null for custom links
How do I only show the links for a certain post_type in my theme?

Set the $post_type in get_related_links($post_type) to 'post', 'page' or any custom post-type. A simple example that show a list of links:

<?php $related_links = get_related_links('page'); ?>
<ul>
    <?php foreach ($related_links as $link): ?>
        <li><a href="<?php echo $link['url']; ?>"><?php echo $link['type']; ?>: <?php echo $link['title']; ?></a></li>
    <?php endforeach; ?>
</ul>
How do I show the related links of another post (not the current one)?

Set the $post_id in get_related_links(null, $post_id) to the id of the post. A simple example that show a list of links:

<?php $related_links = get_related_links(null, 1); ?>
<ul>
    <?php foreach ($related_links as $link): ?>
        <li><a href="<?php echo $link['url']; ?>"><?php echo $link['type']; ?>: <?php echo $link['title']; ?></a></li>
    <?php endforeach; ?>
</ul>
How do I link directly to a media file?

You need to check the 'type' and then get with wp_get_attachment_url() the attachment url from the 'id'.

<?php $related_links = get_related_links(null, 1); ?>
<ul>
<?php foreach ($related_links as $link): ?>
    <?php if ($link['type'] == 'attachment') :
        $url = wp_get_attachment_url($link['id']);
    else :
        $url = $link['url'];
    endif; ?>
    <li><a href="<?php echo $url; ?>"><?php echo $link['title']; ?></a></li>
<?php endforeach; ?>
</ul>
How do show the type of a media file?

You need to check the 'type' and then get with wp_get_attachment_url() the attachment url from the 'id'.

<?php $related_links = get_related_links(null, 1); ?>
<ul>
<?php foreach ($related_links as $link): ?>
    <?php 
    if ($link['type'] == 'attachment') :
        $url = wp_get_attachment_url($link['id']);
        $mime = explode('/', get_post_mime_type($link['id']));
        $mime = $mime[sizeof($mime) - 1];           
    else :
        $url = $link['url'];
        $mime = null;
    endif; 
    ?>
    <li><a href="<?php echo $url; ?>"><?php echo $link['title']; ?><?php echo isset($mime) ? ' (' . $mime . ')' : ''; ?></a></li>
<?php endforeach; ?>
</ul>
How to prevent a PHP error when the plugin is not activated?

Put the get_related_links() function or your whole code into an if clause. Like this your theme will still work even if the plugin is deactivated.

<?php if(function_exists('get_related_links')) : ?>
    <?php $related_links = get_related_links(); ?>
    <ul>
        <?php foreach ($related_links as $link): ?>
            <li><a href="<?php echo $link['url']; ?>"><?php echo $link['type']; ?>: <?php echo $link['title']; ?></a></li>
        <?php endforeach; ?>
    </ul>
<?php endif; ?>

Contributors & Developers

“Related Links” is open source software. The following people have contributed to this plugin.

Contributors

Changelog

1.7.1

  • Removed an obsolete console log that may cause problems on Internet Explorer 7 and 8.

1.7

  • Added a Widget to show the related links in your widgetized theme areas.
  • Fixed a JavaScript error when adding custom links.
  • Settings aren’t reset after plugin reactivation.

1.6

  • Metabox loads new list items while scrolling. Leads to a better load and search performance when a blog contains many hundred posts.
  • Use placeholder attribute for input fields.
  • Use plugins_url() to load stylesheets and javascript.
  • Enqueue jQuery UI correctly.

1.5.7

  • Added related_links() function to echo an unordered list of links
  • Added media post-type to link to media files (thanks jhned)

1.5.6

  • Fixed a problem where empty post data could lead to a php error

1.5.5

  • Fixed the marking of already selected links in the list (thanks robert_k for the fix)

1.5.4

  • Fixed a bug where get_related_links() always returned custom links when the post_type parameter was set

1.5.3

  • Updated CSS for WordPress 3.3

1.5.2

  • Updated the way how settings are saved to be compatible with future WordPress versions

1.5.1

  • Fixed a bug where the plugin was also loaded on the taxonomy admin pages

1.5

  • Links order can be changed with drag and drop
  • Search field to quickly find a link by name
  • External URLs can be added
  • Added an id property to the get_related_links() function
  • New meta data structure but legacy support for older plugin versions is added
  • Checking if the post really exists before it is added to the output
  • Better list loading through ajax

1.0.1

  • The meta box content list is now scrollable

1.0

Initial release