View source for Panasonic IP Control over PHP

Found the following browsing the web in a pastebin:
 <?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"
 
  );