Session help, every user to be logged in as same user !

[bine.heckmann]

Hello, i've got some shop script which has 2 payment modules which i'd like to use for something else, the payment modules only work if the user is logged in though, i tried to make them standalone scripts but that didn't work out too well.

 

So now i decided to go another way and just let everyone have the same session so everyone will be using the same username&password automatically.

 

the index file looks like this:

<?php
include('./inc/config.php');
include('./inc/functions.php');
include('./lang/'.$language.'.lng');
$id = addslashes($_REQUEST["id"]);
$user = addslashes($_REQUEST["username"]);
$pass = addslashes($_REQUEST["password"]);
$language = strtolower($language);
if(empty($id)) $id =1;
$file = mysql_query('SELECT * FROM navi_'.$language.' WHERE id="'.$id.'"');
if(mysql_num_rows($file)>0)
$file = mysql_fetch_array($file);
else
$file = mysql_fetch_array(mysql_query('SELECT * FROM navi_'.$language.' WHERE id="404"'));

if(!empty($user) AND !empty($pass))
{$query = mysql_query('SELECT * FROM users WHERE username="'.$user.'" AND pass="'.md6($pass).'"');
if(mysql_num_rows($query) == 1) {$_SESSION[$session_prefix."user"] = ucfirst($user); echo'<meta http-equiv="refresh" content="0; url=index.php?id=8">';}
else $error = 'Username oder Passwort ist falsch.';}

include('./designe/'.$designe.'/head.tpl');
include('./designe/'.$designe.'/navi.php');
include('./designe/'.$designe.'/middle.tpl');

if(file_exists('./pages/'.$file["file"]))
{echo'<h1>'.ucfirst($file["title"]).'</h1>';
include('./pages/'.$file["file"]);}
if(!empty($error)) echo '<font color="red">'.$error.'</font>'; 

include('./designe/'.$designe.'/foot.tpl');	
?>

 

Now i tried alot of things including adding:

session_start();
$_SESSION["username"] = "peter";
$_SESSION["user"] = "peter";
$_SESSION["id"] = "1";
$_SESSION["pass"] = "peter";
$_SESSION["password"] = "peter";

 

or

$id = "1";
$user = "peter";
$username = "peter";
$pass = "peter";
$password = "peter";

 

also a combination of both, nothing works, but i don't understand why ? Any help is appreciated.

 

/Edit, i tried adding it to the paymentmodule .php aswell, but no luck.