public static function getUserPurv($uid)
{
static $users = array();
if (!isset($users[$uid])) {
$access = array();
$user = User::model()->fetchByUid($uid);
foreach (explode(",", $user["allposid"]) as $posId) {
$access = array_merge($access, PositionUtil::getPurv($posId));
}
$users[$uid] = $access;
}
return $users[$uid];
}