[PHP/MySQL] Problem z sesją, przy odświeżeniu zmienia session_id Opcje

[pionas]

Witam,

mam pewien problem. Otóż wzorowałem się na klasie sesji od punbb i mam pewien problem. Otóż za każdym przeładowaniem strony zmienia mi się session_id(). Oto kod:

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<?php
class Session {
 var $sess_info = array();
 
 function Start() {
  global $config;
  session_save_path($config['session_save_path']);
  session_set_cookie_params($config['session_max_lifetime']*60, $config['cookie_path'], $config['domain'], 1);
  session_name($config['session_name'].'_sid');
 
  if ( !ini_get('session.auto_start') )
   session_start();
  $_SESSION['previous_visit'] = ( !empty($_SESSION['previous_visit']) ) ? $_SESSION['previous_visit'] : 0;
  $_SESSION['viewed_topics'] = ( isset($_SESSION['viewed_topics']) && is_array($_SESSION['viewed_topics']) ) ? $_SESSION['viewed_topics'] : array();
  $_SESSION['latest_post'] = ( !empty($_SESSION['latest_post']) ) ? $_SESSION['latest_post'] : 0;
 
 }
 
 
 function Update($user_id=NULL) {
  global $db, $config;
 
  $current_time = time();
  $ip_addr = ( !empty($_SERVER['REMOTE_ADDR']) ) ? $_SERVER['REMOTE_ADDR'] : getenv('REMOTE_ADDR');
 
  $result = $db->query("SELECT s.user_id, s.started, s.ip_addr, u.* FROM sessions s LEFT JOIN members u ON u.id = s.user_id WHERE sess_id = '".session_id()."'");
  $user_data = $db->fetch_result($result);
 
  if ( is_array($user_data)) {
   $session_started = true;
 
   $current_sess_info = array(
    'user_id' => $user_data['user_id'],
    'started' => $user_data['started'],
    'ip_addr' => $user_data['ip_addr']
   );
 
   if ( $current_sess_info['user_id'] )
    unset($user_data['user_id'], $user_data['started'], $user_data['slocation'], $user_data['pages'], $user_data['ip_addr']);
   else
    unset($user_data);
 
  } else {
   unset($user_data);
   $session_started = false;
  }
 
  if ( $session_started && $current_sess_info['ip_addr'] !== $ip_addr ) {
   
   setcookie($config['session_name'].'_sid', '', null, $config['cookie_path'], $config['domain'], 1);
   $url=str_replace($SID, '', $_SERVER['REQUEST_URI']);
   header('Location: '.$url);
   die('<meta http-equiv="refresh" content="0;URL='.$url.'" />');   
   
  }
 
 
  if ( $user_id !== NULL && abs(intval($user_id))==$user_id) {
   $user_data = $this->get_user_data($user_id);
   $user_id = ( is_array($user_data) && $user_data['id']==$user_id ) ? $user_id : 0;
 
  } elseif ( !$session_started || !$current_sess_info['user_id'] ) {
   if (!empty($_COOKIE[$config['session_name'].'_al']) ) {
 
    list($userid, $passwd) = unserialize($_COOKIE[$config['session_name'].'_al']);
    $user_data=$this->check_user($userid);
    $user_id = ( $passwd == $user_data['password'] && $this->check_user($user_data) ) ? $userid : 0;
    
   } else {
     $user_id = 0;   
   }
 
  } else {
   
   $user_id = ( $this->check_user($user_data['id']) ) ? $user_data['id'] : 0;
   
  }
 
  $new_sess_info = array(
   'user_id' => $user_id,
   'started' => ( $session_started ) ? $current_sess_info['started'] : $current_time,
   'updated' => $current_time,
   'ip_addr' => $ip_addr
  );
  if ( ( !$session_started && $new_sess_info['user_id'] ) || ( $session_started && $new_sess_info['user_id'] > $current_sess_info['user_id'] ) ) {
   do {
    
    $new_sid = md5(uniqid(mt_rand(), true));
    $return = $db->query("SELECT COUNT(*) AS exist FROM sessions WHERE sess_id = '".$new_sid."'");
    $exists = $db->fetch_result($return);
    $exists = (bool)$exists['exist'];
    
   } while ( $exists );
 
   $old_sid = session_id($new_sid);
 
   setcookie($config['session_name'].'_sid', $new_sid, null, $config['cookie_path'], $config['domain'], 1);
   
  }
 
  if ( $session_started ) {
   if ( isset($old_sid) ) {
    $update_query = "UPDATE sessions SET user_id = ".$new_sess_info['user_id'].", updated = ".$new_sess_info['updated'].", ip_addr = '".$new_sess_info['ip_addr']."', sess_id = '".$new_sid."'
    WHERE sess_id = '".$old_sid."'";
   } else {
    $update_query = "UPDATE sessions SET user_id = ".$new_sess_info['user_id'].", updated = ".$new_sess_info['updated'].", ip_addr = '".$new_sess_info['ip_addr']."' WHERE sess_id = '".session_id()."'";
   }
  } else {
   $update_query = "INSERT INTO sessions VALUES ('".session_id()."', ".$new_sess_info['user_id'].", '".$new_sess_info['ip_addr']."', ".$new_sess_info['started'].", ".$new_sess_info['updated'].")";
 
  }
  $db->query($update_query);
  if ( $new_sess_info['user_id'] ) {
   $add_to_update_query = ( !$session_started || $current_sess_info['user_id'] !== $new_sess_info['user_id'] ) ? ', last_login = '.$current_time : '';
   $db->query("UPDATE members SET last_forum = ".$current_time.$add_to_update_query." WHERE id = ".$new_sess_info['user_id']);
   
  }
  
  $this->sess_info = array_merge($new_sess_info, array(
   'sess_id' => session_id()
  ));
  
  $_SESSION['previous_visit'] = ( $new_sess_info['user_id'] && ( !$session_started || $current_sess_info['user_id'] !== $new_sess_info['user_id'] || empty($_SESSION['previous_visit']) ) ) ? $user_data['last_forum'] : $_SESSION['previous_visit'];
 
 }
 
 function check_user($user_id) {
  global $db;
  
  $result = $db->query("SELECT * FROM members WHERE id = ".abs(intval($user_id))." ");
  return $db->fetch_result($result);
 }
 
}
?>
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Gdzie popełniłem błąd? Dziękuję za pomoc

Dobra już nie aktualne... Chwila na świeżym powietrzu pomogła przy znalezieniu błędu: session_save_path($config['session_save_path']);