Optimize Code

[SchweppesAle]

Just started getting into the use of cookies.  The following code will redirect users to a set URL should they view a preset number of pages.  I'm a little concerned with the speed in which this executes though.  Is there a better way, or this fine?

 

public function onPrepareContent(&$article, &$params, $limitstart)

{	

	global $mainframe;



	$content = $article -> text;		
	$current = JURI::current();

	$duration = $this->params->get('duration');
	$destination = $this->params->get('destination');
	$max_count = $this->params->get('maxcount');

$site_id = 'aseihthaslhetlasiehtlasndlksahdlv';
$value = 1;


	if(!(isset($_COOKIE["$site_id"])))
	{
		setcookie("$site_id", $value, time() + 60 * 60 * 24 * $duration);
	}


	if(isset($_COOKIE["$site_id"]))
	{
		$increment = TRUE;
		if($_COOKIE["$site_id"] > $max_count)
		{
			$value = 1;
			setcookie("$site_id", $value, time() + 60 * 60 * 24 * $duration);
			$increment = FALSE;

			header("Location: $destination");

		}

		if($increment)
		{
			$value = $_COOKIE["$site_id"];
			$value++;

			setcookie("$site_id", $value, time() + 60 * 60 * 24 * $duration);
			/*$content = $_COOKIE["$site_id"];*/
		}
	}
   

	$article -> text = $content;

}