PHP Flood Engelleyici

<?php
session_start();
/*
Kodlayan : Ahmet Burak DEMIRKOPARAN
### www.ahmtbrk.com ###
*/
header("content-type: text/html; charset=utf-8");
if(!isset($_SESSION['ilk_zaman'])){
  $_SESSION['ilk_zaman'] = time();
}else{
  $_SESSION['giris']++;
}
if($_SESSION['giris']>=10 && (time() - $_SESSION['ilk_zaman']<10)){
    die("Banlandın");
}else if((time() - $_SESSION['ilk_zaman'])>=10){
   $_SESSION['ilk_zaman'] = time();
   $_SESSION['giris']     = 0;
}
?>
<html>
<head>
</head>
<body>
site
</body>
</html>