VIERA control class

<?php
class vieraControl
{
    public $host;

    function __construct($hostname = false)
    {
        if ($hostname)
            $this->host = $hostname;
    }

    function createRequest($url, $urn, $action, $option = array())
    {

$input = '<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
 <s:Body>
  <u:'.$action.' xmlns:u="urn:'.$urn.'">
  '.$option['args'].'
  </u:'.$action.'>
 </s:Body>
</s:Envelope>';
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, 'http://'.$this->host.':55000/'.$url);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array('SOAPACTION: "urn:'.$urn.'#'.$action.'"'));
        curl_setopt($curl, CURLOPT_POSTFIELDS, $input);
        //curl_setopt($curl, CURLOPT_HEADER, true);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($curl);

        if ($option['returnXml'])
            return $data;
        else
            return $this->getResponse($data);
    }

    function getResponse($data)
    {
        $xml = simplexml_load_string($data);
        if ($xml === false)
            return false;
        $ns = $xml->getNamespaces(true);
        $soap = $xml->children($ns['s']);
        $res = $soap->children($ns['u'])->children();
        return $res[0];
    }

    function getVolume()
    {
        return $this->createRequest(
            'dmr/control_0',
            'schemas-upnp-org:service:RenderingControl:1',
            'GetVolume',
            array('args' => '<InstanceID>0</InstanceID><Channel>Master</Channel>')
        );
    }

    function sendKey($keyCode)
    {
        return $this->createRequest(
            'nrc/control_0',
            'panasonic-com:service:p00NetworkControl:1',
            'X_SendKey',
            array(
                'args' => '<X_KeyEvent>' . $keyCode . '</X_KeyEvent>',
                'returnXml' => true
            )
        );
    }

    function getMute()
    {
        return $this->createRequest(
            'dmr/control_0',
            'schemas-upnp-org:service:RenderingControl:1',
            'GetMute',
            array('args' => '<InstanceID>0</InstanceID><Channel>Master</Channel>')
        );
    }

    function setMute($enable = false)
    {
        $data = ($enable) ? '1' : '0';
        return $this->createRequest(
            'dmr/control_0',
            'schemas-upnp-org:service:RenderingControl:1',
            'SetMute',
            array('args' => '<InstanceID>0</InstanceID><Channel>Master</Channel><DesiredMute>'.$data.'</DesiredMute>')
        );
    }

    function setVolume($volume = '0')
    {
        $volume = intval($volume);
        if ($volume > 100 || $volume < 0)
            throw new Exception('Bad request to volume control. Must be between 0 and 100');

        return $this->createRequest(
            'dmr/control_0',
            'schemas-upnp-org:service:RenderingControl:1',
            'SetVolume',
            array('args' => '<InstanceID>0</InstanceID><Channel>Master</Channel><DesiredVolume>'.$volume.'</DesiredVolume>', 'returnXml' => true)
        );
    }

    function sendString($string)
    {
        return $this->createRequest(
            'nrc/control_0',
            'panasonic-com:service:p00NetworkControl:1',
            'X_SendString',
            array(
                'args' => '<X_String>' . $string . '</X_String>',
                'returnXml' => true
            )
        );
    }
}

$keys = array(
    "NRC_CH_DOWN-ONOFF", // channel down
    "NRC_CH_UP-ONOFF", // channel up
    "NRC_VOLUP-ONOFF", // volume up
    "NRC_VOLDOWN-ONOFF", // volume down
    "NRC_MUTE-ONOFF", // mute
    "NRC_TV-ONOFF", // TV
    "NRC_CHG_INPUT-ONOFF", // AV,
    "NRC_RED-ONOFF", // red
    "NRC_GREEN-ONOFF", // green
    "NRC_YELLOW-ONOFF", // yellow
    "NRC_BLUE-ONOFF", // blue
    "NRC_VTOOLS-ONOFF", // VIERA tools
    "NRC_CANCEL-ONOFF", // Cancel / Exit
    "NRC_SUBMENU-ONOFF", // Option
    "NRC_RETURN-ONOFF", // Return
    "NRC_ENTER-ONOFF", // Control Center click / enter
    "NRC_RIGHT-ONOFF", // Control RIGHT
    "NRC_LEFT-ONOFF", // Control LEFT
    "NRC_UP-ONOFF", // Control UP
    "NRC_DOWN-ONOFF", // Control DOWN
    "NRC_3D-ONOFF", // 3D button
    "NRC_SD_CARD-ONOFF", // SD-card
    "NRC_DISP_MODE-ONOFF", // Display mode / Aspect ratio
    "NRC_MENU-ONOFF", // Menu
    "NRC_INTERNET-ONOFF", // VIERA connect
    "NRC_VIERA_LINK-ONOFF", // VIERA link
    "NRC_EPG-ONOFF", // Guide / EPG
    "NRC_TEXT-ONOFF", // Text / TTV
    "NRC_STTL-ONOFF", // STTL / Subtitles
    "NRC_INFO-ONOFF", // info
    "NRC_INDEX-ONOFF", // TTV index
    "NRC_HOLD-ONOFF", // TTV hold / image freeze
    "NRC_R_TUNE-ONOFF", // Last view
    "NRC_POWER-ONOFF", // Power off

    "NRC_REW-ONOFF", // rewind
    "NRC_PLAY-ONOFF", // play
    "NRC_FF-ONOFF", // fast forward
    "NRC_SKIP_PREV-ONOFF", // skip previous
    "NRC_PAUSE-ONOFF", // pause
    "NRC_SKIP_NEXT-ONOFF", // skip next
    "NRC_STOP-ONOFF", // stop
    "NRC_REC-ONOFF", // record

    // numeric buttons
    "NRC_D1-ONOFF", "NRC_D2-ONOFF", "NRC_D3-ONOFF", "NRC_D4-ONOFF", "NRC_D5-ONOFF",
    "NRC_D6-ONOFF", "NRC_D7-ONOFF", "NRC_D8-ONOFF", "NRC_D9-ONOFF", "NRC_D0-ONOFF",

    // The below commands were not avaliable in the iPhone app when using my
    // VIERA G30 - they were pulled out from a disassembly instead
    // only these top three did anything on my TV

    "NRC_P_NR-ONOFF", // P-NR (Noise reduction)
    "NRC_OFFTIMER-ONOFF", // off timer
    "NRC_R_TUNE-ONOFF", // Seems to do the same as INFO

    "NRC_CHG_NETWORK-ONOFF",
    "NRC_CC-ONOFF",
    "NRC_SAP-ONOFF",
    "NRC_RECLIST-ONOFF",
    "NRC_DRIVE-ONOFF",
    "NRC_DATA-ONOFF",
    "NRC_BD-ONOFF",
    "NRC_FAVORITE-ONOFF",
    "NRC_DIGA_CTL-ONOFF",
    "NRC_VOD-ONOFF",
    "NRC_ECO-ONOFF",
    "NRC_GAME-ONOFF",
    "NRC_EZ_SYNC-ONOFF",
    "NRC_PICTAI-ONOFF",
    "NRC_MPX-ONOFF",
    "NRC_SPLIT-ONOFF",
    "NRC_SWAP-ONOFF",
    "NRC_R_SCREEN-ONOFF",
    "NRC_30S_SKIP-ONOFF",
    "NRC_PROG-ONOFF",
    "NRC_TV_MUTE_ON-ONOFF",
    "NRC_TV_MUTE_OFF-ONOFF",
    "NRC_DMS_CH_UP-ONOFF",
    "NRC_DMS_CH_DOWN-ONOFF"

);