这里不解释，直接上代码，通用，任何主题都可以用
<?php
//文章翻页
function freehaobit(){ //这里是封装用来调用的
$categories = get_the_category();
$categoryIDS = array();
foreach ($categories as $category) {
array_push($categoryIDS, $category->term_id);
}
$categoryIDS = implode(",", $categoryIDS);
?>
<li class="on">
<?php if (get_previous_post($categoryIDS)) { previous_post_link('<span><p> < </p> %link','%title',true,'</span>');} else { echo "<span><p> < </p>已经是最后文章</span>";} ?>
</li>
<li class="under">
<?php if (get_next_post($categoryIDS)) { next_post_link('<span><p> > </p> %link','%title',true,'</span>');} else { echo "<span><p> > </p>已经是最新文章,</span>";} ?>
</li>
<?php } ?>
直接使用<?php freehaobit(); ?>就可以调用
