プラグイン無しで関連記事を実装する

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Code

<?php
$tags = wp_get_post_tags($post->ID);
if ($tags) {
echo '<h3>関連記事</h3><ul>';
$first_tag = $tags[0]->term_id;
$args=array(
'tag__in' => array($first_tag),
'post__not_in' => array($post->ID),
'showposts'=>5,
'caller_get_posts'=>1
);
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
while ($my_query->have_posts()) : $my_query->the_post(); ?>
<li><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
<?php endwhile; } echo '</ul>';} ?>
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Note

Description タグを使って関連記事を抽出する
WordPress Ver. 3.3.1
Via 10 Exceptional WordPress Hacks