public function get_pres_pkt($attrs, $status = null, $show = null, $priority = null, $payload = null)
{
$pres = new XMPPPres($attrs, $status, $show, $priority);
if (!$pres->id) {
$pres->id = $this->get_id();
}
if ($payload) {
$pres->cnode($payload);
}
return $pres;
}