WP-PostViews

• Go to WP-Admin -> Appearance -> Widgets
• The widget name is Views.

<?php if (function_exists('get_least_viewed')): ?>
    <ul>
        <?php get_least_viewed(); ?>
    </ul>
<?php endif; ?>

• The first value you pass in is the post type that you want. If you want to get every post types, just use ‘both’. It also supports PHP array: example array('post', 'page').
• The second value you pass in is the maximum number of post you want to get.
• Default: get_least_viewed(‘both’, 10);

<?php if (function_exists('get_most_viewed')): ?>
    <ul>
        <?php get_most_viewed(); ?>
    </ul>
<?php endif; ?>

• The first value you pass in is the post type that you want. If you want to get every post types, just use ‘both’. It also supports PHP array: example array('post', 'page').
• The second value you pass in is the maximum number of post you want to get.
• Default: get_most_viewed(‘both’, 10);

<?php if (function_exists('get_least_viewed_tag')): ?>
    <ul>
        <?php get_least_viewed_tag(); ?>
    </ul>
<?php endif; ?>

• The first value you pass in is the tag id.
• The second value you pass in is the post type that you want. If you want to get every post types, just use ‘both’. It also supports PHP array: example array('post', 'page').
• The third value you pass in is the maximum number of post you want to get.
• Default: get_least_viewed_tag(1, ‘both’, 10);

<?php if (function_exists('get_most_viewed_tag')): ?>
    <ul>
        <?php get_most_viewed_tag(); ?>
    </ul>
<?php endif; ?>

• The first value you pass in is the tag id.
• The second value you pass in is the post type that you want. If you want to get every post types, just use ‘both’. It also supports PHP array: example array('post', 'page').
• The third value you pass in is the maximum number of post you want to get.
• Default: get_most_viewed_tag(1, ‘both’, 10);

<?php if (function_exists('get_least_viewed_category')): ?>
    <ul>
        <?php get_least_viewed_category(); ?>
    </ul>
<?php endif; ?>

• The first value you pass in is the category id.
• The second value you pass in is the post type that you want. If you want to get every post types, just use ‘both’. It also supports PHP array: example array('post', 'page').
• The third value you pass in is the maximum number of post you want to get.
• Default: get_least_viewed_category(1, ‘both’, 10);

<?php if (function_exists('get_most_viewed_category')): ?>
    <ul>
        <?php get_most_viewed_category(); ?>
    </ul>
<?php endif; ?>

• The first value you pass in is the category id.
• The second value you pass in is the post type that you want. If you want to get every post types, just use ‘both’. It also supports PHP array: example array('post', 'page').
• The third value you pass in is the maximum number of post you want to get.
• Default: get_most_viewed_category(1, ‘both’, 10);

• You can use: <?php query_posts( array( 'meta_key' => 'views', 'orderby' => 'meta_value_num', 'order' => 'DESC' ) ); ?>
• Or pass in the variables to the URL: http://yoursite.com/?v_sortby=views&v_orderby=desc
• You can replace DESC with ASC if you want the least viewed posts.

Use: <div id="postviews_lscwp"></div> to replace <?php if(function_exists('the_views')) { the_views(); } ?>.
NOTE: The id can be changed, but the div id and the ajax function must match.
Replace the ajax query in wp-content/plugins/wp-postviews/postviews-cache.js with

jQuery.ajax({
    type:"GET",
    url:viewsCacheL10n.admin_ajax_url,
    data:"postviews_id="+viewsCacheL10n.post_id+"&action=postviews",
    cache:!1,
    success:function(data) {
        if(data) {
            jQuery('#postviews_lscwp').html(data+' views');
        }
   }
});

Purge the cache to use the updated pages.

You can obtain the number of post views by adding views to your _fields parameter:
/wp/v2/posts?_fields=views,title