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php include 'utils.php'; if (isset($_POST['guess'])) { $guess = (string) $_POST['guess']; if ($guess === $secret) { $message = 'Congratulations! The flag is: ' . $flag; }else { $message = 'Wrong. Try Again'; } } if (preg_match('/utils\.php\/*$/i', $_SERVER['PHP_SELF'])) { exit("hacker :)"); } if (preg_match('/show_source/', $_SERVER['REQUEST_URI'])){ exit("hacker :)"); } if (isset($_GET['show_source'])) { highlight_file(basename($_SERVER['PHP_SELF'])); exit(); }else{ show_source(__FILE__); } ?>