Счетчик кликов на кнопку или количество скачиваний

<?PHP
@error_reporting ( E_ALL ^ E_WARNING ^ E_NOTICE );
@ini_set ( 'error_reporting', E_ALL ^ E_WARNING ^ E_NOTICE );
@ini_set ( 'display_errors', true );
@ini_set ( 'html_errors', false );
define ( 'ROOT_DIR', dirname ( __FILE__ ) );

if(!$_GET['href']) die('Undefinded href');
$href = md5($_GET['href']);
$stat = unserialize(file_get_contents(ROOT_DIR."/stats.txt"));
if(!$stat[$href]) $stat[$href] = 0;
if($_GET['type']=='set'){
	$stat[$href]++;
	file_put_contents(ROOT_DIR. "/stats.txt", serialize($stat), LOCK_EX);
}
echo $stat[$href];
?>

<?php
@error_reporting(E_ALL ^ E_WARNING ^ E_NOTICE);
@ini_set('error_reporting', E_ALL ^ E_WARNING ^ E_NOTICE);
@ini_set('display_errors', true);
@ini_set('html_errors', false);

define('DATALIFEENGINE', true);
define('ROOT_DIR', dirname(__DIR__));
define('ENGINE_DIR', ROOT_DIR . '/engine');

@include (ENGINE_DIR . '/data/config.php');
date_default_timezone_set($config['date_adjust']);
mb_internal_encoding($config['charset']);

require_once ENGINE_DIR . '/classes/mysql.php';
require_once ENGINE_DIR . '/data/dbconfig.php';
require_once ENGINE_DIR . '/modules/functions.php';
include_once ROOT_DIR . '/language/Russian/website.lng';

$href = trim((string)$_GET['href']);
if ($href == '') die('Undefinded href');
$hash = md5($href);

$row = $db->super_query("SELECT id, clicks FROM click_counter WHERE hash = '$hash'");
if ($_GET['type'] == 'set') {
	if ($row['id']) {
		$row['clicks']++;
		$db->query("UPDATE click_counter SET clicks = clicks + 1 WHERE id = {$row['id']}");
	} else {
		$row['clicks'] = 1;
		$db->query("INSERT INTO click_counter (hash) VALUES ('$hash')");
	}
}
echo (int)$row['clicks'];