WordPress Version: 6.2
/**
* Displays the relational link for the previous post adjacent to the current post.
*
* @since 2.8.0
*
* @see get_adjacent_post_rel_link()
*
* @param string $title Optional. Link title format. Default '%title'.
* @param bool $in_same_term Optional. Whether link should be in the same taxonomy term.
* Default false.
* @param int[]|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
* Default true.
* @param string $taxonomy Optional. Taxonomy, if `$in_same_term` is true. Default 'category'.
*/
function prev_post_rel_link($title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category')
{
echo get_adjacent_post_rel_link($title, $in_same_term, $excluded_terms, true, $taxonomy);
}