function read($sessId)
 {
     $prefs = new Preferences();
     $idle = $prefs->idleTime();
     $expiry = time() - $idle;
     $query = "SELECT data FROM Sessions WHERE sessId='{$sessId}' AND lastAccess >= {$expiry}";
     $data = parent::query($query);
     if (isset($data[0])) {
         return $data[0]['data'];
     } else {
         return '';
     }
 }
 function dataField($sessId)
 {
     $prefs = new Preferences();
     $idle = $prefs->idleTime();
     $expiry = time() - $idle;
     $query = "SELECT data FROM Sessions WHERE sessId='{$sessId}' AND lastAccess >= {$expiry}";
     $session = parent::query($query);
     $validData = parent::validateIndexes($session, 0, 'data');
     $vars = preg_split('/([a-z,A-Z]+)\\|/', $validData, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
     if (isset($vars[1])) {
         $validData = unserialize($vars[1]);
         return $validData;
     } else {
         return null;
     }
 }