给本站的 WordPress 绘制了一个评论统计图!点击这里预览。代码主要是通过查询网站数据库,把输出的数据格式化,然后调用 Google Chart Api 绘制图形。
使用方法是新建一个页面模板,在类似 < ?php the_content();?>
前添加以下代码。
<script type="text/javascript" src="https://www.google.com/jsapi"></script> <h2>活跃用户排名</h2> <div id="chart_user_div" style="width:100%; height: 460px; margin: auto;"></div> <h2>评论数量折线图</h2> <div id="chart_day_div" style="width:100%; height: 500px; margin: auto;"></div> <h2>评论数量柱状图</h2> <div id="chart_month_div" style="width:100%; height: 500px; margin: auto;"></div> <?php global $wpdb; $numbers_day = 120; $numbers_month = 13; $numbers_user = 12; $query_day ="SELECT COUNT(*) AS `cnt` , DATE_FORMAT( `comment_date` , '%Y-%m-%d' ) AS d FROM $wpdb->comments GROUP BY d ORDER BY `d` DESC LIMIT 0 , " . $numbers_day; $query_month="SELECT COUNT(*) AS `cnt` , DATE_FORMAT( `comment_date` , '%Y-%m' ) AS d FROM $wpdb->comments GROUP BY d ORDER BY `d` DESC LIMIT 0 , " . $numbers_month; $query_user =" SELECT COUNT( comment_author_email ) AS number, comment_author_email, comment_author FROM ( SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ( $wpdb->posts.ID = $wpdb->comments.comment_post_ID ) WHERE comment_date > date_sub( NOW(), INTERVAL 360 DAY ) AND user_id = '0' AND comment_approved = '1' ORDER BY comment_ID DESC ) AS tempcmt GROUP BY comment_author_email ORDER BY number DESC LIMIT {$numbers_user}"; $output_day = $wpdb->get_results($query_day); $output_month = $wpdb->get_results($query_month); $output_user = $wpdb->get_results($query_user); ?> <script type="text/javascript"> google.load("visualization", "1", {packages:["corechart"]}); google.setOnLoadCallback(drawChart_day); google.setOnLoadCallback(drawChart_month); google.setOnLoadCallback(drawChart_user); function drawChart_day() { var data = google.visualization.arrayToDataTable([ ['date', 'comments'], <?php foreach (array_reverse($output_day) as $o) {echo "['" . $o->d . "'," . $o->cnt . "],";} ?> ]); var options = { title: '每日评论数图' }; var chart = new google.visualization.LineChart(document.getElementById('chart_day_div')); chart.draw(data, options); } function drawChart_month() { var data = google.visualization.arrayToDataTable([ ['date', 'comments'], <?php foreach (array_reverse($output_month) as $o) {echo "['" . $o->d . "'," . $o->cnt . "],";} ?> ]); var options = { title: '每月评论数图' }; var chart = new google.visualization.ColumnChart(document.getElementById('chart_month_div')); chart.draw(data, options); } function drawChart_user() { var data = google.visualization.arrayToDataTable([ ['comment_author', 'comments'], <?php foreach ($output_user as $o) {echo "['" . $o->comment_author . "'," . $o->number . "],";} ?> ]); var options = { title: '一年内最活跃用户图' }; var chart = new google.visualization.PieChart(document.getElementById('chart_user_div')); chart.draw(data, options); } </script>
其中以上引用的 js 文件由于使用了谷歌家的服务可能会无法访问,可以下载到本地后再引用比如本站是这样的:
<script type="text/javascript" src="<?php echo get_template_directory_uri(); ?>/js/jsapi.js"></script>
这是一个很酷的功能,比起简单的文字输出,更加直观清晰,并且可以做其他统计。
刚刚发现手机浏览器没办法显示绘制的图,也不知道哪里错了。