function anderson_makiyama_get_clicks($post_id){

return (int)get_post_meta($post_id, 'anderson_makiyama_clicks', true);

}

function anderson_makiyama_update_clicks($content){

global $post;

$post_id = $post->ID;

if(is_single()){

$total = (int)anderson_makiyama_get_clicks($post_id);
$total++;

update_post_meta($post_id, 'anderson_makiyama_clicks', $total);

}


return $content;

}
add_filter('the_content', 'anderson_makiyama_update_clicks');