WordPress Post Navigation Redux (New Tags!)

For years WordPress post navigation has been possible thanks to a flexible set of five functions, including posts_nav_link(), next_post_link() and next_posts_link(). These navigational functions continue to work great in many WordPress themes, but there are newer, even more flexible functions available to theme developers. Introduced in WordPress 4, these new navigation functions can make it easier than ever to display nav links for your WordPress-powered posts.