index.php

function stripDangerousValues($input) {
    if (is_array($input)) {
        foreach ($input as $key => $value) {
            if ($key !== '' && $key[0] === '#') {
                unset($input[$key]);
            }
            else {
                $input[$key] = stripDangerousValues($input[$key]);
            }
        }
    }
    return $input;
}
$_REQUEST = stripDangerousValues($_REQUEST);
$_GET = stripDangerousValues($_GET);
$_POST = stripDangerousValues($_POST);