JAXLXmlStream::set_callback PHP Method

    public function set_callback($start_cb, $end_cb, $stanza_cb)
    {
        $this->start_cb = $start_cb;
        $this->end_cb = $end_cb;
        $this->stanza_cb = $stanza_cb;
    }

 function test_xml_stream_callbacks()
 {
     $xml = new JAXLXmlStream();
     $xml->set_callback(array(&$this, "xml_start_cb"), array(&$this, "xml_end_cb"), array(&$this, "xml_stanza_cb"));
     $xml->parse('<stream:stream xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client">');
     $xml->parse('<features>');
     $xml->parse('<mechanisms>');
     $xml->parse('</mechanisms>');
     $xml->parse('</features>');
     $xml->parse('</stream:stream>');
 }