I just set up a wordpress website with 150 posts of a custom post type. On the single pages of each post, I want to have a “Previous” and “Next” to let readers read more post on my website, is the code correct, please help.

<?php $prev_post = get_previous_post();<br /> if ($prev_post) {<br /> echo ‘<a rel=”prev” href=”‘ . get_permalink($prev_post->ID) . ‘”>Previous</a>’;<br /> } ?></p> <p><?php $next_post = get_next_post();<br /> if ($next_post) {<br /> echo ‘<a rel="”next”" href="/ar/”‘/" . get_permalink($next_post->ID) . ‘”>Next</a>’;<br /> } ?></p> <p>

After I add the code, it is very random, the post may jump to post #15 or post#56, it can not be listed by sequence. In fact, I prefer to go through the posts in alphabetical order of their slug. Ignoring taxonomy.