Been pulling my hair out trying to get related articles going. I've tried a few methods but this is the only one that has given me results but random posts are shown rather than posts related to it by article.

    'post_per_page'=> 4,
    $count = 0;
        foreach($rel_pst as $rel):setup_postdata($rel);//Loop through and find related posts
        $image = wp_get_attachment_image(get_post_thumbnail_id($rel->ID),'related-posts');
        //Counts iterations to place aricles on seperate sides 

        if (($count  == 0)||($count == 2)){// first article start
            echo '<div class="posts_wrapper">';
            echo '<article class="item_left">';
        if(($count == 1)||($count == 3)){// second article start
            echo'<article class="item_right">';
<div class="pic"> <a href="<?php echo get_permalink($rel); ?>" class="w_hover img-link img-wrap"> <?php echo $image; ?></a> </div>
<h3><a href="<?php echo get_permalink($rel);?>"><?php echo get_the_title($rel); ?></a></h3>
<div class="post-info"> <a href="<?php echo get_permalink($rel);?>" class="post_date"></a> <a href="<?php echo get_permalink($rel); ?>" class="comments_count"></a> </div>
    if(($count == 1)||($count == 3)){//second article/4th end
        echo '</div>';
        $count ++;
//wp_reset_postdata(); ?>

Any help will be appreciated


1) It's tag__in (two underscores) 2) get_the_tags() returns an array of objects, you need IDs:

if ( $the_tags = get_the_tags() ) {
    // https://developer.wordpress.org/reference/functions/wp_list_pluck/
    $the_tags = wp_list_pluck( $the_tags, 'term_id' );

$rel_pst = get_posts( array(
    'tag__in'             => $the_tags,
    'exclude'             => $post->ID,
    'post_per_page'       => 4,
    'ignore_sticky_posts' => true,
    'post_type'           => array(

if ( $rel_pst ) {
    // Do your thing
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  • I will except this as an answer as it works!! Thanks DeadMedic, I owe you one :) – Zayd Bhyat May 5 '16 at 9:40

Whithout knowing the value of $tags variable (you are not showing it to us), the only thing I see wrong in your code is the tag_in argumente, the correct one is tag__in (note the double _).

Also, note that tag__in works with the core tag taxonomy. This taxonomy is not supported by custom post types by default, only by the standard post type.

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  • Ah interesting, so do you have any suggestions for custom post types? Or how I can go about comparing tags of a post against all post types with the same tag(s). Also changing the query to tag__in breaks the query and no results are displayed – Zayd Bhyat May 5 '16 at 8:24
  • Oh and $tags is $tags=get_the_tags(); From the original post – Zayd Bhyat May 5 '16 at 8:25
  • 1
    +1 For opening the discussion for $tags and highlighting the tag_in typo. – TheDeadMedic May 5 '16 at 9:54

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