Using the Favorites get_user_favorites() function to display favorited post data in a custom format

favorites-display.php

<?php

// Method 1: simple foreach loop
$favorites = get_user_favorites();
if ( isset($favorites) && !empty($favorites) ) :
	foreach ( $favorites as $favorite ) :
		// You'll have access to the post ID in this foreach loop, so you can use WP functions like get_the_title($favorite);
	endforeach; 
endif;


/**
* Method 2: WP_Query Object
* Check if there are favorites before instantiating the WP_Query.
* Passing an empty array as an argument returns ALL posts.
* @see https://codex.wordpress.org/Class_Reference/WP_Query#Post_.26_Page_Parameters
*/
$favorites = get_user_favorites();
if ( $favorites ) : // This is important: if an empty array is passed into the WP_Query parameters, all posts will be returned
$paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1; // If you want to include pagination
$favorites_query = new WP_Query(array(
	'post_type' => 'post', // If you have multiple post types, pass an array
	'posts_per_page' => -1,
	'ignore_sticky_posts' => true,
	'post__in' => $favorites,
	'paged' => $paged // If you want to include pagination, and have a specific posts_per_page set
));
if ( $favorites_query->have_posts() ) : while ( $favorites_query->have_posts() ) : $favorites_query->the_post();
	// Treat this like any other WP loop
endwhile; 

next_posts_link( 'Older Favorites', $favorites_query->max_num_pages );
previous_posts_link( 'Newer Favorites' );

endif; wp_reset_postdata();
else :
	// No Favorites
endif;

This code no longer seems to work for anonymous users. When I'm logged into the admin, it works fine.

As an anonymous user, my favorites do not appear in the custom query.

Edit: discovered that this code is not working because the server is running PHP 7- I tested with 5.4.4 and it still works.

This is awesome thank you!

For those who wants to avoid loop from repeating in category template use

if ( $favorites_query->have_posts() ) : $favorites_query->the_post(); and remove endwhile;