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41 results

session.inc

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  • Neil Drumm's avatar
    #61802 by Zen, Double spaced sentences clean up
    Neil Drumm authored
    9cff02e9
    History
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    session.inc 2.93 KiB
    <?php
    // $Id$
    
    /**
     * @file
     * User session handling functions.
     */
    
    function sess_open($save_path, $session_name) {
      return TRUE;
    }
    
    function sess_close() {
      return TRUE;
    }
    
    function sess_read($key) {
      global $user;
    
      // retrieve data for a $user object
      $result = db_query("SELECT sid FROM {sessions} WHERE sid = '%s'", $key);
      if (!db_num_rows($result)) {
        $result = db_query("SELECT u.* FROM {users} u WHERE u.uid = 0");
      }
      else {
        $result = db_query("SELECT u.*, s.* FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.sid = '%s'", $key);
      }
    
      // Build $user object:
      $user = db_fetch_object($result);
      $user = drupal_unpack($user);
    
      // Add roles element to $user:
      $user->roles = array();
      if ($user->uid) {
        $user->roles[DRUPAL_AUTHENTICATED_RID] = 'authenticated user';
    
        $result = db_query("SELECT r.rid, r.name FROM {role} r INNER JOIN {users_roles} ur ON ur.rid = r.rid WHERE ur.uid = %d", $user->uid);
        while ($role = db_fetch_object($result)) {
          $user->roles[$role->rid] = $role->name;
        }
      }
      else {
        $user->roles[DRUPAL_ANONYMOUS_RID] = 'anonymous user';
      }
    
      return !empty($user->session) ? $user->session : '';
    }
    
    function sess_write($key, $value) {
      global $user;
    
      $result = db_query("SELECT sid FROM {sessions} WHERE sid = '%s'", $key);
    
      if (!db_num_rows($result)) {
        // Only save session data when when the browser sends a cookie. This keeps
        // crawlers out of session table. This improves speed up queries, reduces
        // memory, and gives more useful statistics. We can't eliminate anonymous
        // session table rows without breaking throttle module and "Who's Online"
        // block.
        if ($user->uid || $value || count($_COOKIE)) {
          db_query("INSERT INTO {sessions} (sid, uid, cache, hostname, session, timestamp) VALUES ('%s', %d, %d, '%s', '%s', %d)", $key, $user->uid, $user->cache, $_SERVER["REMOTE_ADDR"], $value, time());
        }
      }
      else {
        db_query("UPDATE {sessions} SET uid = %d, cache = %d, hostname = '%s', session = '%s', timestamp = %d WHERE sid = '%s'", $user->uid, $user->cache, $_SERVER["REMOTE_ADDR"], $value, time(), $key);
    
        // TODO: this can be an expensive query. Perhaps only execute it every x minutes. Requires investigation into cache expiration.
        if ($user->uid) {
          db_query("UPDATE {users} SET access = %d WHERE uid = %d", time(), $user->uid);
        }
      }
    
      return TRUE;
    }
    
    function sess_destroy($key) {
      db_query("DELETE FROM {sessions} WHERE sid = '%s'", $key);
    }
    
    function sess_gc($lifetime) {
      // Be sure to adjust 'php_value session.gc_maxlifetime' to a large enough
      // value. For example, if you want user sessions to stay in your database
      // for three weeks before deleting them, you need to set gc_maxlifetime
      // to '1814400'. At that value, only after a user doesn't log in after
      // three weeks (1814400 seconds) will his/her session be removed.
      db_query("DELETE FROM {sessions} WHERE timestamp < %d", time() - $lifetime);
    
      return TRUE;
    }