【WordPress】【ワードプレス】人気記事を持ってくる

functions.php

// 記事のPVを取得
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 View";
    }
    return $count.' Views';
}

// 記事のPVをカウントする
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);
    }
}
remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);

single.php

if (!is_user_logged_in() && !is_robots()) {
    setPostViews(get_the_ID());
}

任意のxxx.php

  <h4>よく読まれている記事</h4>
    <hr>
    <?php $args = ['post_type'=>'post','meta_key'=>'post_views_count','orderby'=>'meta_value_num','posts_per_page'=> 5,'order'=>'DESC','post_status'=>'publish'];?>
    <?php $the_view_query = new WP_Query( $args );?>
    <?php if ($the_view_query->have_posts()) {?>
      <?php while($the_view_query->have_posts()) { ?>
        <?php $the_view_query->the_post();?>
        <!-- タイトル表示 -->
        <div>
            <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
            <p><?php echo getPostViews($post->ID); ?></p>
        </div>
      <?php } ?>
    <?php } ?>
    <?php wp_reset_postdata();?>