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Standalone View

				<?php

				require_once JAXL_CWD.'/xmpp/xmpp_xep.php';

				define('NS_XMPP_PING', 'urn:xmpp:ping');

				class XEP_0199 extends XMPPXep {

				//
				// abstract method
				//

				public function init() {
				return array(
				'on_auth_success' => 'on_auth_success',
				'on_get_iq' => 'on_xmpp_ping'
				);
				}

				//
				// api methods
				//

				public function get_ping_pkt() {
				$attrs = array(
				'type'=>'get',
				'from'=>$this->jaxl->full_jid->to_string(),
				'to'=>$this->jaxl->full_jid->domain
				);

				return $this->jaxl->get_iq_pkt(
				$attrs,
				new JAXLXml('ping', NS_XMPP_PING)
				);
				}

				public function ping() {
				$this->jaxl->send($this->get_ping_pkt());
				}

				//
				// event callbacks
				//

				public function on_auth_success() {
				JAXLLoop::$clock->call_fun_periodic(30 * pow(10,6), array(&$this, 'ping'));
				}

				public function on_xmpp_ping($stanza) {
				if($stanza->exists('ping', NS_XMPP_PING)) {
				$stanza->type = "result";
				$stanza->to = $stanza->from;
				$stanza->from = $this->jaxl->full_jid->to_string();
				$this->jaxl->send($stanza);
				}
				}

				}

				?>