Need Help: Auto Login Script (90% there!)

[Noel 4 DMB]

Hey folks, I have a script that finds a match in the database and then performs an auto-login function to make the user logged in.

However, after a few minutes of inactivity, the session apparently expires. What part of this code can I modify to make sure they stay logged in longer, or is there a spot where I can define a period of time in seconds?

Here is the code:

PHP Code:


function auto_login($userid, $username, $redirect)
{
 global $vbulletin;

 if (!isset($_SESSION))
     session_start();
    
 // Log them in        
 $loginFormAction             =    $_SERVER['PHP_SELF']; 
 $_SESSION['MM_Username']    =    $username; 
 $_SESSION['MM_UserGroup']     =     '';  
 $vbulletin->db->query_write("DELETE FROM vb_session WHERE sessionhash = '" . $vbulletin->db->escape_string($vbulletin->session->vars['dbsessionhash']) . "'");
 $newsession =& new vB_Session($vbulletin, '', $userid, '', $vbulletin->session->vars['styleid']);
 $newsession->set('userid', $userid);
 $newsession->set('loggedin', 1);
 $newsession->set('bypass', 0);
 $newsession->set_session_visibility(($vbulletin->superglobal_size['_COOKIE'] > 0));
 $vbulletin->session =& $newsession;    
 ($hook = vBulletinHook::fetch_hook('login_process')) ? eval($hook) : false;              
 header("Location: $redirect");    
} 


anyone?

can anyone help me with this?