WordPress Version: 5.6
/**
* Displays relational links for the posts adjacent to the current post for single post pages.
*
* This is meant to be attached to actions like 'wp_head'. Do not call this directly in plugins
* or theme templates.
*
* @since 3.0.0
* @since 5.6.0 No longer used in core.
*
* @see adjacent_posts_rel_link()
*/
function adjacent_posts_rel_link_wp_head()
{
if (!is_single() || is_attachment()) {
return;
}
adjacent_posts_rel_link();
}