function show()
 {
     ob_start();
     $xml = '';
     $xml .= '<GS_XML_Application>' . "\n";
     $xml .= '<Display>' . "\n";
     $xml .= $this->_specificXML();
     $xml .= '</Display>' . "\n";
     if (!$this->_softkeys) {
         $softkeys = new GrandstreamXMLSoftkeys();
         $softkeys->add(0, 'Exit', 'quit');
         $this->_softkeys = $softkeys;
     }
     $xml .= $this->_softkeys->asXML();
     if ($this->_events) {
         $xml .= $this->_events->asXML();
     }
     $xml .= '</GS_XML_Application>' . "\n";
     print $xml;
     if (!headers_sent()) {
         header('Content-Type: application/xml');
         header('Content-Length: ' . (int) @ob_get_length());
     }
     @ob_end_flush;
 }
require_once dirName(__FILE__) . '/../../../../inc/conf.php';
require_once GS_DIR . 'inc/db_connect.php';
include 'grandstream-class.php';
$info = trim(@$_REQUEST['info']);
if (!preg_match('/(system|user|phone)/', $info)) {
    $info = 'system';
}
$url = 'http://192.168.8.11/gemeinschaft/prov/grandstream/xml/';
# db connect
$db = gs_db_slave_connect();
# ip
$remote_ip = trim(@$_SERVER['REMOTE_ADDR']);
# user_id
$user_id = (int) $db->executeGetOne('SELECT `id` FROM `users` WHERE `current_ip`=\'' . $db->escape($remote_ip) . '\'');
# define softkeys
$keys = new GrandstreamXMLSoftkeys();
$keys->add(0, 'System Info', 'url', $url . 'test.php?info=system');
$keys->add(1, 'User Info', 'url', $url . 'test.php?info=user');
$keys->add(2, 'Phone Info', 'url', $url . 'test.php?info=phone');
$keys->add(4, 'Exit', 'quit');
$y = 7;
$screen = new GrandstreamXMLScreen();
if ($info === 'system') {
    $screen->addString(0, 'System Info', 107, 0, 'font="f18c" halign="Center" valign="Top"');
    # asterisk version
    $err = 0;
    $out = array();
    @exec('sudo asterisk -rx \'core show version\' 2>>/dev/null', $out, $err);
    if ($err === 0) {
        $out = trim(implode(' ', $out));
        //$out = htmlEnt($out);