Sæt cookie eller session så jeg ikke skal logge ind

PHP kode 

 setcookie("cookie_name", "cookie_data", time()+3600, "path", "domain");

PHP kode 

 setcookie("LOGIN_INFO", "......", time()+3600, "/", ".youtube.com", 1);

PHP kode 

 $site = $_GET["link"];
 $qd = mysql_query("SELECT name, value, domain, path, http FROM cookies WHERE site='$site' LIMIT 1);
 header('Location: $site'); 
 if(mysql_num_rows($qd) > 0){
   $data = mysql_fetch_assoc($qd);
   setcookie($data["name"], $data["value"], time()+60*60, $data["path"], $data["domain"], $data["http"]); 
 }