WordPress非插件实现文章浏览次数统计功能

WordPress文章浏览次数统计功能基本上是所有网站都需要用到的，目前市面上很多WordPress主题都集成了该功能。但也有一部分主题没有文章浏览次数统计功能，这时你可以使用 WP-Postviews 插件，亦或者直接使用代码实现该功能。

此方法是参考willin kan大师的my_visitor插件来写的，刷新一次文章页面就统计一次，比较简单实用。

非插件统计文章浏览次数

1.在主题的 functions.php文件添加下面的代码：

/* 访问计数 */
function record_visitors()
{
    if (is_singular())
    {
        global $post;
        $post_ID = $post->ID;
        if($post_ID)
        {
            $post_views = (int)get_post_meta($post_ID, 'views', true);
            if(!update_post_meta($post_ID, 'views', ($post_views+1)))
            {
                add_post_meta($post_ID, 'views', 1, true);
            }
        }
    }
}
add_action('wp_head', 'record_visitors');

/// 函数名称：post_views
/// 函数作用：取得文章的阅读次数
function post_views($before = '(点击 ', $after = ' 次)', $echo = 1)
{
    global $post;
    $post_ID = $post->ID;
    $views = (int)get_post_meta($post_ID, 'views', true);
    if ($echo) echo $before, number_format($views), $after;
    else return $views;
}

在需要显示该统计次数的地方使用下面的代码调用：

阅读：<?php post_views(' ', ' 次'); ?>

获取浏览次数最多的文章

如果要获取上面的函数统计出来的浏览次数最多的文章，可以在 functions.php文件添加下面的代码：

/// get_most_viewed_format
/// 函数作用：取得阅读最多的文章
function get_most_viewed_format($mode = '', $limit = 10, $show_date = 0, $term_id = 0, $beforetitle= '(', $aftertitle = ')', $beforedate= '(', $afterdate = ')', $beforecount= '(', $aftercount = ')') {
    global $wpdb, $post;
    $output = '';
    $mode = ($mode == '') ? 'post' : $mode;
    $type_sql = ($mode != 'both') ? "AND post_type='$mode'" : '';
    $term_sql = (is_array($term_id)) ? "AND $wpdb->term_taxonomy.term_id IN (" . join(',', $term_id) . ')' : ($term_id != 0 ? "AND $wpdb->term_taxonomy.term_id = $term_id" : '');
    $term_sql.= $term_id ? " AND $wpdb->term_taxonomy.taxonomy != 'link_category'" : '';
    $inr_join = $term_id ? "INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id)" : '';

    // database query
    $most_viewed = $wpdb->get_results("SELECT ID, post_date, post_title, (meta_value+0) AS views FROM $wpdb->posts LEFT JOIN $wpdb->postmeta ON ($wpdb->posts.ID = $wpdb->postmeta.post_id) $inr_join WHERE post_status = 'publish' AND post_password = '' $term_sql $type_sql AND meta_key = 'views' GROUP BY ID ORDER BY views DESC LIMIT $limit");
    if ($most_viewed) {
        foreach ($most_viewed as $viewed) {
            $post_ID    = $viewed->ID;
            $post_views = number_format($viewed->views);
            $post_title = esc_attr($viewed->post_title);
            $get_permalink = esc_attr(get_permalink($post_ID));
            $output .= "<li>$beforetitle$post_title$aftertitle";
            if ($show_date) {
                $posted = date(get_option('date_format'), strtotime($viewed->post_date));
                $output .= "$beforedate $posted $afterdate";
            }
            $output .= "$beforecount $post_views $aftercount</li>";
        }
    } else {
        $output = "<li>N/A</li>n";
    }
    echo $output;
}

然后使用下面的函数调用：

<?php get_most_viewed_format(); ?>