get_adjacent_post() code example
Example 1: get_adjacent_post wordpress
$prev_post = get_adjacent_post();
if( $prev_post )
echo '<a href="'. get_permalink($prev_post->ID) .'">'. $prev_post->post_title .'</a>';
Example 2: get_adjacent_post wordpress
<?php
$prev = mod_get_adjacent_post('prev', array('post', 'custom1', 'custom2'));
$next = mod_get_adjacent_post('next', array('post', 'custom1', 'custom2'));
?>
<?php if($prev) : ?>
<a href="<?php echo get_permalink($prev->ID)?>">« Go back in time</a>
<?php endif; ?>
<?php if($next) : ?>
<a href="<?php echo get_permalink($next->ID)?>">Next: <?php echo $next->post_title; ?> »</a>
<?php endif; ?>