WordPress博客页面增加最近访客功能

2024-09-07 00:50:57

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我们常常会看到一些站长写的博客会有一个最新访客功能了,他们可以非常大气的这个功能好复杂了,我后来百度一搜索发现了有很多相关文章了,下面来给各位整理一下方法.

原生wp函数就无法做到了,所以只能退居其次,调用最近留言的访客,当然,每个人只会显示一次,把下面代码放到functions.php中:

//获取最近读者

function visitors($tim,$lim){

global $wpdb;

$query="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) WHERE comment_date > date_sub( NOW(), INTERVAL $tim day ) AND comment_author_email != '' AND post_password='' AND comment_approved='1' AND comment_type='') AS tempcmt GROUP BY comment_author_email ORDER BY comment_date DESC LIMIT $lim";

$wall = $wpdb->get_results($query);

foreach ($wall as $comment)

{

if( $comment->comment_author_url )

$url = $comment->comment_author_url;

else $url="#";

$r="rel='external nofollow'";

$tmp = "<li><a href='".$url."' ".$r." title='".$comment->comment_author." 留下".$comment->cnt."条信息'>".get_avatar($comment->comment_author_email, 40)."</a></li>";

$output .= $tmp;

}

echo $output ;

}

上面是核心函数,然后需要做成小工具就可以了,代码如下:

//注册 Widget 小工具

add_action('widgets_init', create_function('', 'return register_widget("mk_visitors");'));

class mk_visitors extends WP_Widget {

//注册一个WordPress小工具

function mk_visitors(){

  $this->WP_Widget('mk_visitors', '读者墙', array( 'description' => '显示近期评论最多的读者头像' ));

}

//前端显示小工具

function widget($args, $instance) {

  extract($args, EXTR_SKIP);

  echo $before_widget;

  $title = apply_filters('widget_name', $instance['title']);

  $limit = $instance['limit'];

  $timer = $instance['timer'];

  echo $before_title.$title.$after_title;

  echo '<ul class="visitors">';

  echo visitors($tim=$timer, $lim=$limit );

  echo '</ul><div class="clear"></div>';

  echo $after_widget;

}

//保存小工具设置选项

function update($new_instance, $old_instance) {

  $instance = $old_instance;

  $instance['title'] = strip_tags($new_instance['title']);

  $instance['limit'] = strip_tags($new_instance['limit']);

  $instance['timer'] = strip_tags($new_instance['timer']);

  return $instance;

}

//后台小工具表单

function form($instance) {

  $instance = wp_parse_args( (array) $instance, array(

   'title' => '最近读者',

   'limit' => '15',

   'timer' => '30'

   )

  );

  $title = strip_tags($instance['title']);

  $limit = strip_tags($instance['limit']);

  $timer = strip_tags($instance['timer']);

  echo '<p><label>标题：<input class="widefat" id="'.$this-/>get_field_id('title').'" name="'.$this->get_field_name('title').'" type="text" value="'.$instance['title'].'" /></label></p><p><label>显示数目：<input class="widefat" id="'.$this-/>get_field_id('limit').'" name="'.$this->get_field_name('limit').'" type="number" value="'.$instance['limit'].'" /></label></p><p><label>几天内：<input class="widefat" id="'.$this-/>get_field_id('timer').'" name="'.$this->get_field_name('timer').'" type="number" value="'.$instance['timer'].'" /></label></p>';

}

}

上面的说明已经很仔细了,然后就是样式的问题了,这个可以自由发挥,下面是明凯博客的样式了:

.sidebar ul {

list-style: none;

margin: 1.5em 0;

padding: 0;

}

.sidebar ul li {

margin: 0;

padding: 5px 0;

border-top: 1px solid #ddd;

color: #969696;

}

.visitors li{float:left;}