WordPress Post Views Counter Function

function wpb_set_post_views($postID) {

    $count_key = 'wpb_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);

    }

}

//Get rid of prefetching to keep the count accurate

remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);