WordPress fix Reply To: How get the category slug of adjacent posts

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Reply To: How get the category slug of adjacent posts, by louiswol94

Place this code in your functions.php:

function adjacent_post_by_category( $category, $direction, $content ) {

// Info
$postIDs = array();
$currentPost = get_the_ID();

// Get posts based on category
$postArray = get_posts( array(

'category' => $category,
'orderby'=>'post_date',
'order'=> 'DESC'

) );

// Get post IDs
foreach ( $postArray as $thepost ):

$postIDs[] = $thepost->ID;

endforeach;

// Get prev and next post ID
$currentIndex = array_search( $currentPost, $postIDs );
$prevID = $postIDs[ $currentIndex - 1 ];
$nextID = $postIDs[ $currentIndex + 1 ];

// Return information
if( $direction == 'next' AND $nextID ):

return '<a rel="next" href="' . get_permalink( $nextID ) . '">' . $content . '</a>';

elseif( $direction == 'prev' AND $prevID ):

return '<a rel="prev" href="' . get_permalink( $prevID ) . '">' . $content . '</a>';

else:

return false;

endif;

}

—————-

And this as your prev/next links (function parameters are examples):

<?php echo adjacent_post_by_category( 10, 'prev', 'Show previous post' ); ?>

<?php echo adjacent_post_by_category( 10, 'next', 'Show next post' ); ?>

—————-

Regards
Louis
https://wemanageyoursite.com/

Reply To: How get the category slug of adjacent posts