HTML如何转XTML

 ob_start();
 $html = curl_init('http://www.beijing.gov.cn/');
 curl_exec($html);
 $html = iconv('GBK','UTF-8',$html);
 $config = array('indent' => TRUE,
     'output-xhtml' => TRUE,
     'wrap' => 200);
 $tidy = tidy_parse_string($html,$config,'UTF8');
 $tidy->cleanRepair();
 $tidyhtml = (string)$tidy;
 $xml = simplexml_load_string($tidyhtml);
 echo $tidyhtml;
 var_dump($xml);