WordPress的插件的确很丰富，使用起来也很方便，但部分插件间有可能存在冲突，部分插件如不再使用会留下些后遗症，插件用多了还会增加服务器压力，我是尽量不用插件的，博客上很多功能基本上是在function.php里添加函数实现短代码调用或用JS实现的。这里要讲的是怎样用function.php短代码调用最新评论、最热文章、相关文章、标签云。

最新评论代码：WordPress默认的是以（评论者on文章名）形式的，觉得这样不是很好，这里将其修改为（评论者：评论内容）形式，并把链接改为评论链接。用

        <ul>
            <?php dp_recent_comments(); ?>
        </ul>

调用。并将以下代码加入function.php中（在最后一个“?>”前就可以）：

/*    RECENT COMMENTS
—————————
*/
function dp_recent_comments($no_comments = 5, $comment_len = 65) {
    global $wpdb;
    $request = "SELECT * FROM $wpdb->comments";
    $request .= " JOIN $wpdb->posts ON ID = comment_post_ID";
    $request .= " WHERE comment_approved = ‘1′ AND post_status = ‘publish’ AND post_password =”";
    $request .= " ORDER BY comment_date DESC LIMIT $no_comments";
    $comments = $wpdb->get_results($request);
    if ($comments) {
        foreach ($comments as $comment) {
            ob_start();
            ?>
                <li>
                    <a href="<?php echo get_permalink( $comment->comment_post_ID ) . ‘#comment-’ . $comment->comment_ID; ?>"><?php echo dp_get_author($comment); ?>: <span style="color:#333; "></a><?php echo strip_tags(substr(apply_filters(‘get_comment_text’, $comment->comment_content), 0, $comment_len)); ?></span> …
                </li>
            <?php
            ob_end_flush();
        }
    } else {
        echo ‘<li>’.__(‘No comments’, ‘banago’).”;
    }
}

function dp_get_author($comment) {
    $author = "";
    if ( empty($comment->comment_author) )
        $author = __(‘Anonymous’, ‘banago’);
    else
        $author = $comment->comment_author;
    return $author;
}

还可根据需要加入调用头像代码。

最热文章代码：调用方式为

        <ul>
            <?php wp_popular_posts(); ?>
        </ul>

将以下代码加入function.php中（在最后一个“?>”前就可以）

/*    POPULAR POSTS
—————————
*/
function wp_popular_posts() {
    global $wpdb;
    $result = $wpdb->get_results("SELECT comment_count,ID,post_title FROM $wpdb->posts ORDER BY comment_count DESC LIMIT 0 , 5");
    foreach ($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="Permalink to <?php echo $title; ?>"><?php echo $title; ?></a></li>
        <?php
        }
    }
}

相关文章代码：调用方式为

        <ul>
            <?php wp_popular_posts(); ?>
        </ul>

将以下代码加入function.php中（在最后一个“?>”前就可以）：

/*    RELATED POSTS
—————————
*/
function wp_related_posts($postid) {
    $tags = wp_get_post_tags($postid);
    if ($tags) {
        $tag_ids = array();
        foreach($tags as $individual_tag) $tag_ids[] = $individual_tag->term_id;
        $args=array(
            ‘tag__in’ => $tag_ids,
            ‘post__not_in’ => array($post->ID),
            ’showposts’=>5, // Number of related posts that will be shown.
            ‘caller_get_posts’=>1
        );
        $related_post = new wp_query($args);
        if( $related_post->have_posts() ) {
            while ($related_post->have_posts()) {
                $related_post->the_post();
            ?>
                <li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
            <?php
            }
        }
    }
}

标签云代码：可以调用系统的代码：<?php wp_tag_cloud(); ?>