Wordpress主题中常用代码总结

1. 在 Wordpress主题中显示最热文章的 PHP代码

<?php $result = $wpdb->get_results("SELECT comment_count,ID,post_title FROM 
　　$wpdb->posts ORDER BY comment_count DESC LIMIT 0 , 10"); 
　　foreach ($result as $post) { 
　　　　setup_postdata($post); 
　　　　$postid = $post->ID; 
　　　　$title = $post->post_title; 
　　　　$commentcount = $post->comment_count; 
　　　　if ($commentcount != 0) { ?> 
　　　　　　<li><a href="<?php echo get_permalink($postid); ?>" title="<?php echo $title ?>"> 
　　<?php echo $title ?></a> (<?php echo $commentcount ?>)</li> 
<?php } } ?> 

2. wordpress主题–相关文章代码

<div id="newpost"> 
 <ul> 
 <?php 
 $tags = wp_get_post_tags($post->ID); 
 if ($tags) { 
 $first_tag = $tags[0]->term_id; 
 $args=array( 
 'tag__in' => array($first_tag), 
 'post__not_in' => array($post->ID), 
 'showposts'=>10, 
 '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="Permanent Link to 
 <?php the_title_attribute(); ?>"><?php the_title(); ?> 
 </a> </li> 
 <?php endwhile; } else {echo 'not realate post';} }else {echo 'not 
realate post';} ?>

3. Wordpress主题使用 PHP代码输出最新文章

<?php 
$limit = get_option('posts_per_page'); 
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1; 
query_posts('showposts=' . $limit=7 . '&paged=' . $paged); 
$wp_query->is_archive = true; $wp_query->is_home = false; 
?> 
<?php while(have_posts()) : the_post(); if(!($first_post == $post->ID)) : ?> 
<ul> 
<li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to 
<?php the_title_attribute(); ?>"><?php the_title(); ?></a></li> 
</ul> 
<?php endif; endwhile; ?>

4. 最新评论：

<?php 
global $wpdb; 
$sql= "SELECT DISTINCT ID, post_title, post_password, 
comment_ID,comment_post_ID, comment_author, comment_date_gmt, 
comment_approved,comment_type,comment_author_url, 
SUBSTRING(comment_content,1,30) AScom_excerpt FROM $wpdb->comments LEFT OUTER 
JOIN $wpdb->posts ON($wpdb->comments.comment_post_ID = $wpdb->posts.ID) 
WHEREcomment_approved = '1' AND comment_type = " AND post_password = " ORDERBY 
comment_date_gmt DESC LIMIT 10"; 
$comments = $wpdb->get_results($sql); 
$output = $pre_HTML; 
foreach ($comments as $comment) { 
$output.= "
<li>". "<a href="" .get_permalink($comment->ID)."#comment-" . 
$comment->comment_ID ."" title="on 
".$comment->post_title ."">".strip_tags($comment->comment_author)."</a>" .
": ".strip_tags($comment->com_excerpt)."</li>"; 
} 
$output .= $post_HTML; 
echo $output; 
?>

5. wordpress主题–相关文章代码

基本sql是这样：$sql = “SELECT p.ID, p.post_title, 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’ GROUP BY t_r.object_id ORDER BY cnt
DESC, p.post_date_gmt DESC LIMIT $limit;”;
一点一点的解释：term_taxonomy 、term_relationship、posts这三张表存的什么我不多说，网上一般都可以查到，维基百科貌似都有。把他们连起来，做个 sql，注意 group by以及limit，这样就可以提取结果了$related_post = $wpdb->get_results($sql);
之前要把$taglist 做好，利用wp_get_post_tags($post->ID);可以将该篇文章的的 tag 取到一个数组中，然后再链接就可以了 最后怎么处理输出就看个人爱好了，这个功能我写的大概也就十几行，我比较喜欢简短的说，呵呵。

function related_post($limit = 10) { 
global $wpdb, $post; 
$tags = wp_get_post_tags($post->ID); 
$taglist = "'" . $tags[0]->term_id. “‘”; 
$tagcount = count($tags); 
if ($tagcount > 1) { 
for ($i = 1; $i < $tagcount; $i++) { 
$taglist .= “, ‘”.$tags[$i]->term_id.”‘”; 
} 
} 
$sql = “SELECT p.ID, p.post_title, 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’ GROUP 
BY t_r.object_id ORDER BY cnt DESC, p.post_date_gmt DESC LIMIT $limit;”; 
$related_post = $wpdb->get_results($sql); 
$output = “”; 
foreach ($related_post as $tmp){ 
$output .= 这个就看个人爱好了 
} 
if($output == “”)$output = “No Related Post Yet”; 
echo $output; 
}