WordPress.org

Option 1 - Automatic install

Use the plugin installer built into WordPress to search for the plugin. WordPress will then download and install it for you.

Option 2 - Manual install

1. Make sure the files are within a folder.
2. Copy the whole folder inside the wp-content/plugins/ folder.
3. In the backend, activate the plugin. You can now select related posts when you create or edit blog posts, pages etc.

How to display the related posts on your website

The related posts are displayed by adding

<?php echo $related->show($post_id); ?>

to your template. Replace $post_id with a post ID. If you call it within the WordPress loop, you can use

<?php echo $related->show(get_the_ID()); ?>

You have the option of either outputting a pre-formatted list or returning a PHP array of related posts to customise the markup yourself.

Examples

Example 1: Using the default output

<?php echo $related->show(get_the_ID()); ?>

This can be called within the WordPress loop. It will output a <ul> list with links.

Example 2: Returning an array

<?php $rel = $related->show(get_the_ID(), true); ?>

With the second argument set to true, it will return an array of post objects. Use it to generate your own custom markup. Here is an example:

<?php
    $rel = $related->show(get_the_ID(), true);

    // Display the title of each related post
    foreach ($rel as $r) :
        echo $r->post_title . '<br />';
    endforeach;
?>