有或无插件实现wordpress相关文章

有插件实现WordPress调用相关文章：
第一款是：Yet Another Related Posts Plugin
Matt Cutts也推荐这款，而且好评如潮！
第二款是：WordPress Related Posts
这款吧也不错，可以试试，不过这款个人感觉效率上比较差，造成网页打开速度偏慢！
无插件实现wordpress调用相关文章：

【方法一：标签相关】

<ul id="tags_related"><?phpglobal $post;$post_tags = wp_get_post_tags($post->ID);if ($post_tags) {  foreach ($post_tags as $tag) {    // 获取标签列表    $tag_list[] .= $tag->term_id;  }  // 随机获取标签列表中的一个标签  $post_tag = $tag_list[ mt_rand(0, count($tag_list) - 1) ];  // 该方法使用 query_posts() 函数来调用相关文章，以下是参数列表  $args = array(        'tag__in' => array($post_tag),        'category__not_in' => array(NULL),  // 不包括的分类ID        'post__not_in' => array($post->ID),        'showposts' => 6,                           // 显示相关文章数量        'caller_get_posts' => 1    );  query_posts($args);  if (have_posts()) {    while (have_posts()) {      the_post(); update_post_caches($posts); ?>    <li>* <a href="<?php the_permalink(); ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></li><?php    }  }  else {    echo '<li>* 暂无相关文章</li>';  }  wp_reset_query();}else {  echo '<li>* 暂无相关文章</li>';}?></ul>

【方法二：分类相关】

<ul id="cat_related"><?phpglobal $post;$cats = wp_get_post_categories($post->ID);if ($cats) {    $args = array(          'category__in' => array( $cats[0] ),          'post__not_in' => array( $post->ID ),          'showposts' => 6,          'caller_get_posts' => 1      );  query_posts($args);  if (have_posts()) {    while (have_posts()) {      the_post(); update_post_caches($posts); ?>  <li>* <a href="<?php the_permalink(); ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></li><?php    }  }  else {    echo '<li>* 暂无相关文章</li>';  }  wp_reset_query();}else {  echo '<li>* 暂无相关文章</li>';}?></ul>

【方法三：标签相关，SQL获取】

<ul id="tags_related"><?phpglobal $post, $wpdb;$post_tags = wp_get_post_tags($post->ID);if ($post_tags) {    $tag_list = '';    foreach ($post_tags as $tag) {        // 获取标签列表        $tag_list .= $tag->term_id.',';    }    $tag_list = substr($tag_list, 0, strlen($tag_list)-1);    $related_posts = $wpdb->get_results("        SELECT DISTINCT ID, post_title        FROM {$wpdb->prefix}posts, {$wpdb->prefix}term_relationships, {$wpdb->prefix}term_taxonomy        WHERE {$wpdb->prefix}term_taxonomy.term_taxonomy_id = {$wpdb->prefix}term_relationships.term_taxonomy_id        AND ID = object_id        AND taxonomy = 'post_tag'        AND post_status = 'publish'        AND post_type = 'post'        AND term_id IN (" . $tag_list . ")        AND ID != '" . $post->ID . "'        ORDER BY RAND()        LIMIT 6");        // 以上代码中的 6 为限制只获取6篇相关文章        // 通过修改数字 6，可修改你想要的文章数量    if ( $related_posts ) {        foreach ($related_posts as $related_post) {?>    <li><a href="<?php echo get_permalink($related_post->ID); ?>" rel="bookmark" title="<?php echo $related_post->post_title; ?>"><?php echo $related_post->post_title; ?></a></li><?php   }    }    else {      echo '<li>暂无相关文章</li>';    }}else {  echo '<li>暂无相关文章</li>';}?></ul>

【方法四：分类相关，SQL获取】

<ul id="cat_related"><?phpglobal $post, $wpdb;$cats = wp_get_post_categories($post->ID);if ($cats) {  $related = $wpdb->get_results("  SELECT post_title, ID  FROM {$wpdb->prefix}posts, {$wpdb->prefix}term_relationships, {$wpdb->prefix}term_taxonomy  WHERE {$wpdb->prefix}posts.ID = {$wpdb->prefix}term_relationships.object_id  AND {$wpdb->prefix}term_taxonomy.taxonomy = 'category'  AND {$wpdb->prefix}term_taxonomy.term_taxonomy_id = {$wpdb->prefix}term_relationships.term_taxonomy_id  AND {$wpdb->prefix}posts.post_status = 'publish'  AND {$wpdb->prefix}posts.post_type = 'post'  AND {$wpdb->prefix}term_taxonomy.term_id = '" . $cats[0] . "'  AND {$wpdb->prefix}posts.ID != '" . $post->ID . "'  ORDER BY RAND( )  LIMIT 6");  if ( $related ) {      foreach ($related as $related_post) {?>    <li>* <a href="<?php echo get_permalink($related_post->ID); ?>" rel="bookmark" title="<?php echo $related_post->post_title; ?>"><?php echo $related_post->post_title; ?></a></li><?php    }  }  else {    echo '<li>* 暂无相关文章</li>';  }}else {  echo '<li>* 暂无相关文章</li>';}?></ul>

【方法五：作者相关】

<ul id="author_related"><?php  global $post;  $post_author = get_the_author_meta( 'user_login' );  $args = array(        'author_name' => $post_author,        'post__not_in' => array($post->ID),        'showposts' => 6,               // 显示相关文章数量        'orderby' => date,          // 按时间排序        'caller_get_posts' => 1    );  query_posts($args);  if (have_posts()) {    while (have_posts()) {      the_post(); update_post_caches($posts); ?>  <li>* <a href="<?php the_permalink(); ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></li><?php    }  }  else {    echo '<li>* 暂无相关文章</li>';  }  wp_reset_query();?></ul>

以上代码博主亲测可用，有什么疑问可以留言！