$Dom=new \DOMDocument('1.0', 'utf-8');
$paper=$Dom->createElement('paper');
$Dom->appendChild($paper);
$exercises=$Dom->createElement('exercises');
$exercises->setAttribute('id','1');
$exercises->setAttribute('type','1');
$exercises->setAttribute('answer','1');
$paper->appendChild($exercises);
$title=$Dom->createElement('title');
$title->setAttribute('label','1');
$title->setAttribute('mapsrc','1');
$title->setAttribute('soundsrc','1');
$exercises->appendChild($title);
$option=$Dom->createElement('option');
$option->setAttribute('id','1');
$option->setAttribute('label','1');
$option->setAttribute('mapsrc','1');
$option->setAttribute('soundsrc','1');
$exercises->appendChild($option);
header("Content-type: application/xml");
echo $Dom->saveXml(); exit;