Viết Widget Top 10 Bài Viết Được Xem Nhiều Nhất (ok)

https://fcwordpress.net/viet-widget-top-10-bai-viet-duoc-xem-nhieu-nhat.html

count_counter_top_posts.php

<?php
  function setPostViews($postID) {
    $count_key = 'post_views_count';
    $count = get_post_meta($postID, $count_key, true);
    if($count==''){
      $count = 0;
      delete_post_meta($postID, $count_key);
      add_post_meta($postID, $count_key, '0');
    }else{
      $count++;
      update_post_meta($postID, $count_key, $count);
    }
  }
  function getPostViews($postID){ 
    $count_key = 'post_views_count';
    $count = get_post_meta($postID, $count_key, true);
    if($count==''){
      delete_post_meta($postID, $count_key);
      add_post_meta($postID, $count_key, '0');
      return "0";
    }
    return $count;
  }
  class top_view_posts extends WP_Widget {
    function __construct(){
      $widget_ops = array('description' => 'Lionel Tin đọc nhiều nhất');
      $control_ops = array('width' => 300, 'height' => 300);
      parent::__construct(false,$name='Tin đọc nhiều nhất',$widget_ops,$control_ops);
    }
    function form($instance){
      global $wpdb;
      $instance = wp_parse_args( (array) $instance, array('title'=>'','numbershow'=>'') );
      $title = htmlspecialchars($instance['title']);
      $numbershow = htmlspecialchars($instance['numbershow']);
      ?>
        <p>
          <label for="<?php echo $this->get_field_id('title'); ?>">Title </label>      
          <input type="text" name="<?php echo $this->get_field_name('title'); ?>" id="<?php echo $this->get_field_id('title'); ?>" style="width:100%" value="<?php echo $title; ?>">
        </p>
        <p>
          <label for="<?php echo $this->get_field_id('numbershow'); ?>">Show number: </label>      
          <input type="text" name="<?php echo $this->get_field_name('numbershow'); ?>" id="<?php echo $this->get_field_id('numbershow'); ?>" style="width:100%" value="<?php echo $numbershow; ?>">
        </p>  
      <?php         
    }
    function update($new_instance, $old_instance){
      $instance = $old_instance;
      $instance['title'] = stripslashes($new_instance['title']);
      $instance['numbershow'] = stripslashes($new_instance['numbershow']);
      return $instance;
    }
    function widget($args, $instance) {
      global $wpdb,$post, $product;
      extract($args);
      $title= empty($instance['title']) ? '' : $instance['title'];
      $numbershow= empty($instance['numbershow']) ? '' : $instance['numbershow'];
      echo $before_widget;
        if ( ! empty( $instance['title'] ) ) {
          echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'] ). $args['after_title'];
        }
      ?>
      <ul>
        <?php
          $args = array(
            'post_type' => 'post',
            'posts_per_page' => $numbershow,
            'post_status' => 'publish',
            'meta_key'   => 'post_views_count',
            'orderby'    => 'meta_value_num',
            'order'      => 'DESC'
          );
          $wp_query = new WP_Query( $args );      
          if ( $wp_query->have_posts() ) :  while ( $wp_query->have_posts() ) : $wp_query->the_post(); 
          ?>    
            <li>
              <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a>
              <span class="getPostViews"><?php echo getPostViews(get_the_ID()); ?> lượt xem</span>
            </li>
          <?php                    
            endwhile;      
            wp_reset_postdata();
          endif;
        ?>  
      </ul>        
      <?php
      echo $after_widget;
    }
  }
  register_widget('top_view_posts');
?>

single.php

setPostViews(get_the_ID());

Đọc thêm:

How to Display Popular Posts by Views in WordPress without a Plugin

How to Display Popular Posts by Views in WordPress (2 Ways)WPBeginner

Last Viewed Posts

https://wordpress.org/plugins/last-viewed-posts/