<?php
$popularpost = new WP_Query( array( 'posts_per_page' => 8, 'meta_key' => 'wpb_post_views_count', 'orderby' => 'rand meta_value_num', 'order' => 'DESC'  ) );
while ( $popularpost->have_posts() ) : $popularpost->the_post(); ?>
<div class="toppost">
<a href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>">
<div class="posttitle">
<?php
$topposttitle = esc_html( get_the_title() );
//echo $topposttitle;
echo substr($topposttitle,0,20)."...";
?>
</div>
<div class="postthumb">
<?php if ( has_post_thumbnail() ) {

    the_post_thumbnail('tpthumbs');

    //echo get_the_post_thumbnail(get_the_ID(), array(210,120,true));
} ?>
</div>
</a>
</div>
<?php endwhile;
?>