至善至寒-善冰居|Good ice in Blog

转载原文地址：http://www.92app.com/related-posts-wordpress.html 理解是互相的看到此文想转载的请加上原文链接

代码添加到function.php文件中即可：

//WordPress Related Posts

$wp_rp=array(

‘limit’=>10, //相关文章数量

‘wp_rp_rss’=>true, //是否在feed 中显示相关文章

‘wp_no_rp’=>’random’, //无相关文章时的选择：text 或random（random-随机文章)

‘wp_rp_date’=>true, //显示文章发布日期

‘wp_rp_comments’=>true, //显示文章评论数

‘wp_rp_title_tag’=>’h2′, //选择相关文章标题标签(h2 ,h3 ,h4 ,p ,div)

);

function wp_get_random_posts ($limitclause=”") {

global $wpdb, $post;

$q = “SELECT ID, post_title, post_content,post_excerpt, post_date, comment_count FROM $wpdb->posts WHERE post_status = ‘publish’ AND post_type = ‘post’ AND ID != $post->ID ORDER BY RAND() $limitclause”;

return $wpdb->get_results($q);

}

function wp_get_related_posts()

{

global $wpdb, $post,$wp_rp;

$limit =$wp_rp["limit"];

$wp_rp_title=’Related Posts’; //相关文章标题

if(!$post->ID){return;}

$now = current_time(‘mysql’, 1);

$tags = wp_get_post_tags($post->ID);

$taglist = “‘” . $tags[0]->term_id. “‘”;

$tagcount = count($tags);

if ($tagcount > 1) {

for ($i = 1; $i < $tagcount; $i++) {

$taglist = $taglist . “, ‘” . $tags[$i]->term_id . “‘”;

}

}

if ($limit) {

$limitclause = “LIMIT $limit”;

} else {

$limitclause = “LIMIT 10″;

}

$q = “SELECT p.ID, p.post_title, p.post_content,p.post_excerpt, p.post_date, p.comment_count, count(t_r.object_id) as cnt FROM $wpdb->term_taxonomy t_t, $wpdb->term_relationships t_r, $wpdb->posts p WHERE t_t.taxonomy =’post_tag’ AND t_t.term_taxonomy_id = t_r.term_taxonomy_id AND t_r.object_id = p.ID AND (t_t.term_id IN ($taglist)) AND p.ID != $post->ID AND p.post_status = ‘publish’ AND p.post_date_gmt < ‘$now’ GROUP BY t_r.object_id ORDER BY cnt DESC, p.post_date_gmt DESC $limitclause;”;

$related_posts = $wpdb->get_results($q);

$output = “”;

//不存在相关日志则显示随机日志

if (!$related_posts)

{

if($wp_rp['wp_no_rp'] == “text”)

{

$output .= ‘<li>没找到请返回主页</li>’; //无相关文章时显示标题

}

else

{

if($wp_rp['wp_no_rp'] == “random”)

{

$wp_no_rp_text= ‘相关文章‘; //随机文显示标题

$related_posts = wp_get_random_posts($limitclause);

}

$wp_rp_title = $wp_no_rp_text;

}

}

foreach ($related_posts as $related_post )

{

$output .= ‘<li>’;

if($wp_rp['wp_rp_date'])

{

$dateformat = get_option(‘date_format’);

$output .= mysql2date($dateformat, $related_post->post_date) . ” — “; //日期和文章标题间隔符，默认是 —

}

$output .= ‘<a href=”‘.get_permalink($related_post->ID).’” title=”‘.wptexturize($related_post->post_title).’”>’.wptexturize($related_post->post_title).’</a>’;

if ($wp_rp["wp_rp_comments"])

{

$output .= ” (” . $related_post->comment_count . “)”;

}

$output .= ‘</li>’;

}

$output = ‘<ul>’ . $output . ‘</ul>’;

$wp_rp_title_tag = $wp_rp["wp_rp_title_tag"];

if(!$wp_rp_title_tag)

$wp_rp_title_tag =’h3′;

if($wp_rp_title != ”)

$output = ‘<’.$wp_rp_title_tag.’ >’.$wp_rp_title .’</’.$wp_rp_title_tag.’>’. $output;

return $output;

}

function wp_related_posts_attach($content)

{

global $wp_rp;

if (is_single()||(is_feed() && $wp_rp["wp_rp_rss"]))

{

$output = wp_get_related_posts();

$content = $content.$output;

}

return $content;

}

add_filter(‘the_content’, ‘wp_related_posts_attach’,100);