Php Şifreli sayfa sorunu

<?php
require('class/libs/Smarty.class.php');
require_once('class/base.php');
require_once('class/func.php');


$TAN = new BASE();

/*$pass = '123123';
if($_GET['pass']=='ok'){
    if($pass==$_GET['val']){
        $TAN->set_userdata("auth", crypt($pass));
    }
    exit;
}*/

if(!$TAN->is_login('uid')){
	redirect('login.php');
}
if( !isset( $TAN->config['allowPage']['kuponmudahale'][$TAN->userdata('yetki')] ) ){
	redirect('index.php');
}

if ($TAN->config['authKey'] != '' and $_SERVER['PHP_AUTH_USER']!=$TAN->config['authKey'] and $_SERVER['PHP_AUTH_PW']!=$TAN->config['authKey'] and isset($TAN->config['allowPage']['kuponmudahaleFull'][$TAN->userdata('yetki')]) ) {
    header('WWW-Authenticate: Basic realm="Parola Gerekli"');
    header('HTTP/1.0 401 Unauthorized');
    echo '<script> alert("Yanlış Parola"); location.href="index.php?sess_id='.$_GET['sess_id'].'"; </script>';
    exit;
}