使用SimpleXML阅读YouTube XML [关闭]

I want to read/retrieve some details from a single YouTube video using:

$sxml= simplexml_load_file("http://gdata.youtube.com/feeds/api/videos/gzDS-Kfd5XQ");

How can i read the tags from the XML file like title, description? I search and found a couple of tutorials, but I can't find one that shows how to read specific XML data. Any good tutorial links or examples will be appreciated.

Please see this tutorial: http://www.w3schools.com/php/php_xml_simplexml.asp
Basic use would be

print $xml->something;