Infinite next and previous post looping in WordPress

infinite-previous-next-looping.php

<?php 
/**
 *  Infinite next and previous post looping in WordPress
 */
if( get_adjacent_post(false, '', true) ) { 
	previous_post_link('%link', '&larr; Previous Post');
} else { 
    $first = new WP_Query('posts_per_page=1&order=DESC'); $first->the_post();
    	echo '<a href="' . get_permalink() . '">&larr; Previous Post</a>';
  	wp_reset_query();
}; 
    
if( get_adjacent_post(false, '', false) ) { 
	next_post_link('%link', 'Next Post &rarr;');
} else { 
	$last = new WP_Query('posts_per_page=1&order=ASC'); $last->the_post();
    	echo '<a href="' . get_permalink() . '">Next Post &rarr;</a>';
    wp_reset_query();
}; 

Awesome! Thanks for this!

I took inspiration from it and made my own version that returns the actual post object rather than a link.

If you're interested:
https://gist.github.com/samjdavis13/3a843c961aed69c732f0a61da854b16d

@danidanidantas it is possible, according to the documentation for get_adjacent_post https://codex.wordpress.org/Function_Reference/get_adjacent_post

@danidanidantas I was searching for the same solution, you don't do it with get_adjacent_post, you add the following to the WP_Query string &post_type=name-of-post-type

Is not working for me ... the last post links to itself.

Any suggestions?

<?php 
/**
 *  Infinite next and previous post looping in WordPress
 */
if( get_adjacent_post(false, '', true) ) { 
	previous_post_link('%link', '<i class="fa fa-angle-left"></i> Previous Brand');
} else { 
    $first = new WP_Query('post_type=product_bands&posts_per_page=1&order=DESC'); $first->the_post();
    	echo '<a href="' . get_permalink() . '"><i class="fa fa-angle-left"></i> Previous Brand</a>';
  	wp_reset_query();
}; 

    
if( get_adjacent_post(false, '', false) ) { 
	next_post_link('%link', 'Next Brand <i class="fa fa-angle-right"></i>');
} else { 
	$last = new WP_Query('post_type=product_bands&posts_per_page=1&order=ASC'); $last->the_post();
    	echo '<a href="' . get_permalink() . '">Next Brand <i class="fa fa-angle-right"></i></a>';
    wp_reset_query();
}; 

?>

great! thanks.

Try this amouratoglou, but replace the post type.

if( get_adjacent_post(false, '', false) ) { 
	next_post_link('%link', '← Previous project');
} else { 
	$last = new WP_Query('post_type=project&posts_per_page=1&order=DESC'); $last->the_post();
	echo '<a href="' . get_permalink() . '">&larr; Previous project</a>';
	wp_reset_query();
}; 


if( get_adjacent_post(false, '', true) ) { 
	previous_post_link('%link', 'Next project &rarr;');
} else { 
	$first = new WP_Query('post_type=project&posts_per_page=1&order=ASC'); $first->the_post();
	echo '<a href="' . get_permalink() . '">Next project &rarr;</a>';
	wp_reset_query();
}; 

Just as a head's up, you should probably be using wp_reset_postdata(), not wp_reset_query(), since the latter is typically only used if you're using query_posts and not WP_Query.

This was super helpful and worked like a charm. Thanks!

Hi everyone, @amouratoglou I had the same problem. Thanks @cabrailsford for the heads up.
Heres the fix:
` <?php

if( get_adjacent_post(false, '', false) ) { 
    next_post_link('%link', '← Previous project');
} else { 
        $first = new WP_Query('post_type=CHANGETHIS&posts_per_page=1&order=ASC'); $first->the_post();
    echo '<a href="' . get_permalink() . '">&larr; Previous project</a>';
    wp_reset_postdata();
}; 


if( get_adjacent_post(false, '', true) ) { 
    previous_post_link('%link', 'Next project &rarr;');
} else { 

        $last = new WP_Query('post_type=CHANGETHIS&posts_per_page=1&order=DESC'); $last->the_post();

    echo '<a href="' . get_permalink() . '">Next project &rarr;</a>';
    wp_reset_postdata();
}; 

?>`

Hi)
this work for me (don't forget change post type):

if( get_adjacent_post(false, '', true) ) { 
	previous_post_link('%link', '← %title');
} else { 
    $first = new WP_Query('post_type=projects&posts_per_page=1&order=DESC'); $first->the_post();
    	echo '<a href="' . get_permalink() . '">&larr; '. get_the_title() .'</a>';
  	wp_reset_query();
}; 
    
if( get_adjacent_post(false, '', false) ) { 
	next_post_link('%link', '%title &rarr;');
} else { 
	$last = new WP_Query('post_type=projects&posts_per_page=1&order=ASC'); 
	$last->the_post();
    	echo '<a href="' . get_permalink() . '">'. get_the_title() .' &rarr;</a>';
    wp_reset_query();
};