track_post_views

function.php

<?php 

function track_post_views ($post_id) {
if ( !is_single() ) return;
   if ( empty ( $post_id) ) {
     global $post;
     $post_id = $post->ID;
   }
   set_post_views($post_id);
}
add_action( 'wp_head', 'track_post_views');