I am using Underscores.me for a project. I’d like to add the featured image (thumbnail) to the previous / next post links. They have a function which I’m trying to edit called THEMENAME_post_nav()
. I am struggling to tweak this function to make it include the thumbnails. Can anyone help please? Here’s the code:
function THEMENAME_post_nav() {
// Don't print empty markup if there's nowhere to navigate.
$previous = ( is_attachment() ) ? get_post( get_post()->post_parent ) : get_adjacent_post( false, '', true );
$next = get_adjacent_post( false, '', false );
// This is how I'm trying to include the thumbnails
$prevthumbnail = get_the_post_thumbnail($previous->ID);
$nextthumbnail = get_the_post_thumbnail($next->ID);
if ( ! $next && ! $previous ) {
return;
}
?>
<nav class="navigation post-navigation" role="navigation">
<h1 class="screen-reader-text"><?php _e( 'Post navigation', 'THEMENAME' ); ?></h1>
<div class="nav-links">
<?php
previous_post_link( '<div class="nav-previous">%link</div>$prevthumbnail', _x( '<span class="meta-nav">←</span> %title', 'Previous post link', 'THEMENAME' ) );
next_post_link( '<div class="nav-next">%link</div>$nextthumbnail', _x( '%title <span class="meta-nav">→</span>', 'Next post link', 'THEMENAME' ) );
?>
</div><!-- .nav-links -->
</nav><!-- .navigation -->
<?php
}
I solved the problem by using
get_the_post_thumbnail()
instead of the variables$prevthumbnail
and$nextthumbnail
.}
It seems to me that you have unintendedly put the variables
$prevthumbnail
and$nexxtthumbnail
inside single quotes.Following what I just stated, I would try this: