Post hit counter in wordpress

hit-counter.php

<?php
//In functions.php
function getHits($postID){
$hits_token = 'post_views_hits';
$hits = get_post_meta($postID, $hits_token, true);
if($hits==''){
delete_post_meta($postID, $hits_token);
add_post_meta($postID, $hits_token, '0');
return "0 View";
}
return $hits.' Views';
}
function setHits($postID) {
$hits_token = 'post_views_hits';
$hits = get_post_meta($postID, $hits_token, true);
if($hits==''){
$hits = 0;
delete_post_meta($postID, $hits_token);
add_post_meta($postID, $hits_token, '0');
}else{
$hits++;
update_post_meta($postID, $hits_token, $hits);
}
}
//In single.php
setHits(get_the_ID());
//And the output area
echo getHits(get_the_ID());
?>