DOMDocument Help Needed

Okay so basically this script will print an image with the stats retrieved from the XML file at http://75.126.211.99/player2xml.php?n=(playersname).

Problem is, if the name is wrong the XML file will return just "Error". And that makes my script go crazy.

Working example: http://stats.aruaguru.com/stats.php?q=xadet3
Non-working example: http://stats.aruaguru.com/stats.php?q=thisnamedoesntexist

How can I make it so it doesn't do anything if the Character tag doesn't exist?

if($_GET["q"] != NULL)
{
	create_image();
	exit();
}
else
{
	echo "Error.";
}

function create_image()
{
	$q=$_GET["q"];

	$xmlDoc = new DOMDocument();
	$xmlDoc->load("http://75.126.211.99/player2xml.php?n=".$q."");

	$x=$xmlDoc->getElementsByTagName('Character');

	$font = 'PORKYS.TTF';

	$image = imagecreatefrompng('pstats.png');  

	$colour = ImageColorAllocate($image, 229, 229, 229);

	$y=$x->item($i)->getElementsByTagName('Level');
	$z=$x->item($i)->getElementsByTagName('Job');
   
	$name = $q;

	$class = $z->item(0)->childNodes->item(0)->nodeValue;

	$level = $y->item(0)->childNodes->item(0)->nodeValue;

	imagettftext($image, 8, 0, 110, 33, $colour, $font, $name);
	
	imagettftext($image, 8, 0, 110, 53, $colour, $font, $class);

	imagettftext($image, 8, 0, 110, 72, $colour, $font, $level);

	header("Content-Type: image/png"); 

	Imagepng($image);
   
	ImageDestroy($image);

}

PHP:

 

Try:

if (@$xmlDoc->load("http://75.126.211.99/player2xml.php?n=".$q.""))
{
	$class = $z->item(0)->childNodes->item(0)->nodeValue;
	$level = $y->item(0)->childNodes->item(0)->nodeValue;
}
else
{
	$class = 'default';
	$level = 'default';
}

PHP:

 

Still giving errors for nicks that don't exist. Thanks anyway.