According to this tutorial if I want to display link to previous post in the same category, I can use the following code: <?php previous_post_link('%link', 'Previous in category', TRUE, '13'); ...
The following code <?php previous_post('%', '<', 'no'); ?> <?php next_post('%', '> ', 'no'); ?> returns these links, as it should <a ...
I'm trying to create a function in functions.php that includes the next_post_link() and previous_post_link() without success. It returns empty. My guess is that these don't use the post ID... So what ...