Celeng Capca

<?php
@session_start();
define("FILE", __FILE__);
#require_once("ctf.php");
if(isset($_POST['nick']) && isset($_POST['captcha'])) {
    $nick = $_POST['nick'];
    $captcha = $_POST['captcha'];
    #check_browser();
    if($captcha == $_SESSION['xy']) {
        echo "SUKSES BEB";
    }
}
$x = mt_rand(24,40);
$y = mt_rand(1,10);
$_SESSION['xy'] = $x*$y;
?>