安装开始：
在主题目录下functions.php文件，添加下面的函数代码。
//添加站点统计小工具
include("widget-websitestat.php");
添加下面的 CSS 代码，主题没有自定义 CSS 样式的，在主题目录下 style.css添加即可。
然后创建一个 PHP 文件：widget-websitestat.php 然后把下面的 php 代码添加进去
<?php
// WordPress 统计信息小工具
// 名称: 网站信息统计
// 独立修改并美化
// 定义小工具的类 EfanWebsitestat
class EfanWebsitestat extends WP_Widget{
function __construct(){
// 定义小工具的构造函数
$widget_ops = array('classname' => 'widget_Websitestat', 'description' => '显示网站的统计信息');
// $this->WP_Widget(false, 'ly522 网站统计', $widget_ops);
parent::__construct( false, '轻刻年轮- 网站统计', $widget_ops);
}
function form($instance){
// 表单函数,控制后台显示
// $instance 为之前保存过的数据
// 如果之前没有数据的话,设置默认量
$instance = wp_parse_args(
(array)$instance,
array(
'title' => '网站信息统计',
'establish_time' => '2021-01-01'
)
);
$title = htmlspecialchars($instance['title']);
$establish_time = htmlspecialchars($instance['establish_time']);
// 表格布局输出表单
$output = '<table>';
$output .= '<tr><td>标题</td><td>';
$output .= '<input id="'.$this->get_field_id('title') .'" name="'.$this->get_field_name('title').'" type="text" value="'.$instance['title'].'" />';
$output .= '</td></tr><tr><td>建站时间：</td><td>';
$output .= '<input id="'.$this->get_field_id('establish_time') .'" name="'.$this->get_field_name('establish_time').'" type="text" value="'.$instance['establish_time'].'" />';
$output .= '</td></tr></table>';
echo $output;
}
function update($new_instance, $old_instance){
// 更新数据的函数
$instance = $old_instance;
// 数据处理
$instance['title'] = strip_tags(stripslashes($new_instance['title']));
$instance['establish_time'] = strip_tags(stripslashes($new_instance['establish_time']));
return $instance;
}
function widget($args, $instance){
extract($args); //展开数组
$title = apply_filters('widget_title',empty($instance['title']) ? ' ' : $instance['title']);
$establish_time = empty($instance['establish_time']) ? '2021-01-01' : $instance['establish_time'];
echo $before_widget;
echo $before_title . $title . $after_title;
echo '<div class="widgest-boys"><ul>';
$this->efan_get_websitestat($establish_time);
echo '</ul></div>';
echo $after_widget;
}
function efan_get_websitestat($establish_time){
// 相关数据的获取
global $wpdb;
$count_posts = wp_count_posts();
$published_posts = $count_posts->publish;
$comments_count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->comments");
$time = floor((time()-strtotime($establish_time))/86400);
$count_tags = wp_count_terms('post_tag');
$count_pages = wp_count_posts('page');
$link = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->links WHERE link_visible = 'Y'");
$users = $wpdb->get_var("SELECT COUNT(ID) FROM $wpdb->users");
$last = $wpdb->get_results("SELECT MAX(post_modified) AS MAX_m FROM $wpdb->posts WHERE (post_type = 'post' OR post_type = 'page') AND (post_status = 'publish' OR post_status = 'private')");
$last = date('Y-m-d', strtotime($last[0]->MAX_m));
$total_views = $wpdb->get_var("SELECT SUM(meta_value+0) FROM $wpdb->postmeta WHERE meta_key = 'views'");
// 显示数据
$output = '<div class="widgest-bg widgest-bg1"><div class="widgest-main"><div class="widgest-meat"><li>资源总数：';
$output .= $published_posts;
$output .= ' 篇</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg2"><div class="widgest-main"><div class="widgest-meat"><li>评论数目：';
$output .= $comments_count;
$output .= ' 条</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg3"><div class="widgest-main"><div class="widgest-meat"><li>标签总数：';
$output .= $count_tags;
$output .= ' 个</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg4"><div class="widgest-main"><div class="widgest-meat"><li>浏览次数：';
$output .= $total_views;
$output .= ' 次</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg5"><div class="widgest-main"><div class="widgest-meat"><li>友链总数：';
$output .= $link;
$output .= ' 个</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg6"><div class="widgest-main"><div class="widgest-meat"><li>用户总数：';
$output .= $users;
$output .= ' 个</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg7"><div class="widgest-main"><div class="widgest-meat"><li>运行天数：';
$output .= $time;
$output .= ' 天</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg8"><div class="widgest-main"><div class="widgest-meat"><li>建站时间：';
$output .= $establish_time;
$output .= '</li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg9"><div class="widgest-main"><div class="widgest-meat"><li>最后更新：';
$output .= $last;
$output .= '</li></div></div></div>';
// 页面生成耗时+数据库查询
$output .= '<div class="widgest-bg widgest-bg10"><div class="widgest-main"><div class="widgest-meat"><li>数据查询：';
$output .= get_num_queries();
$output .= ' 次 </li></div></div></div>';
$output .= '<div class="widgest-bg widgest-bg11"><div class="widgest-main"><div class="widgest-meat"><li>生成耗时：';
$output .= timer_stop(0,5);
$output .= '秒</li></div></div></div>';
echo $output;
}
}
function EfanWebsitestat(){
// 注册小工具
register_widget('EfanWebsitestat');
}
add_action('widgets_init','EfanWebsitestat');
?>
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