sort the displayed articles by popularity

Post views. We are using external counters, but it is difficult to use it with wortdpress core.

I found a code for resolving my problem, bit i’m not sure hoe to use it correctly with Enfold. May be you can help me?

To count the post views, the first thing you have to do is to add the following code to your WordPress Theme functions.php
<?php
/*
 * Set post views count using post meta//functions.php
 */
function customSetPostViews($postID) {
    $countKey = 'post_views_count';
    $count = get_post_meta($postID, $countKey, true);
    if($count==''){
        $count = 0;
        delete_post_meta($postID, $countKey);
        add_post_meta($postID, $countKey, '1');
    }else{
        $count++;
        update_post_meta($postID, $countKey, $count);
    }
}
?>
And now we will call this function in the single.php to update the count value in the Database.
<?php
    customSetPostViews(get_the_ID());//single.php
?>
Now to show all the popular post in the descending order by post view count. use this code:
<?php//popular post query
    query_posts('meta_key=post_views_count&posts_per_page=5&orderby=meta_value_num&
    order=DESC');
    if (have_posts()) : while (have_posts()) : the_post();
?>
    <li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php
    endwhile; endif;
    wp_reset_query();
?>