Displaying internal linkbacks on WordPress

I have written a lot of blog posts. In some of those posts I link to other posts on my site. What's the easiest way of displaying those internal incoming links?

Here's what it looks like:

Code

All we need to do is search WordPress for the URl of the current page. Loop through the results. Then display those links.

 PHP$the_query = new WP_Query(

    array(

        's' => get_the_permalink(), // This post

        'post_type' => 'post',      // Only posts, not pages

        "posts_per_page" => "-1",   // Get all results

        "order" => "ASC"            // Oldest first

    )

);



//  Nothing to do if there are no inbound links

if ( !$the_query->have_posts() ) {

    return;

}



//  Loop through the posts

while ( $the_query->have_posts() ) {

    //  Set it up

    $the_query->the_post();

    $id            = get_the_ID();

    $title         = esc_html( get_the_title() );

    $url           = get_the_permalink();

    $comment_date  = get_the_date( "c" );

    $comment_year  = get_the_date( "Y" );



    //  Get the thumbnail

    if ( has_post_thumbnail( $id) ) {

        $thumb = get_the_post_thumbnail( $rid, 'full', 

            array( "class"   => "related-post-img",

                   "loading" => "lazy" //   Lazy loading and other attributes

            ) 

        );

    } else {

        $thumb = null;

    }



    //  Create the HTML for the incoming link

    echo <<<EOT

    <li>

        <a href="$url">

            $thumb

            $title

        </a>

        <time datetime="$comment_date">$comment_year</time>

    </li>

    EOT;



}

In order to reduce duplicates, you may also want to disable self-ping. Here's some code you can stick in your functions.php:

 PHPfunction no_self_ping( &$links ) {



    $home = esc_url( home_url() );



    // Process each link in the content and remove if it matches the current site URL

    foreach ( $links as $l => $link ) {

        if ( 0 === strpos( $link, $home ) ) {

            unset( $links[ $l ] );

        }

    }

}

add_action( 'pre_ping', 'no_self_ping' );