lolcaptcha

<?
/*
  captcha.php
  jQuery Fancy Captcha
  www.webdesignbeach.com

  Created by Web Design Beach.
  Copyright 2009 Web Design Beach. All rights reserved.
*/
session_start(); /* starts session to save generated random number */

/* this compare captcha's number from POST and SESSION */
if($_SERVER['REQUEST_METHOD'] == "POST" && $_POST[captcha] && $_POST[captcha] == $_SESSION[captcha])
    {
        echo "Passed!"; /* YOUR CODE GOES HERE */
        unset($_SESSION[captcha]); /* this line makes session free, we recommend you to keep it */
    }
elseif($_SERVER['REQUEST_METHOD'] == "POST" && !$_POST[captcha])
    {
        echo "Failed!";
    }
/* in case that form isn't submitted this file will create a random number and save it in session */
else
    {
        $rand = rand(0,4);
        $_SESSION[captcha] = $rand;
        echo $rand;
    }
?>