问题
I'm trying to get an xml stream by using curl. I've recieved the string with curl but I'm having troubles parsing the xmlstream with SimpleXML. The url im using is http://www.google.com/books/feeds/volumes/fR4vqfywNlgC and it seems to be ignoring the parts containing "dc". Why?
回答1:
The dublin core data (at least, I'm assuming that's what the DC prefix means in this case) uses its own namespace. You need to refer to that namespace when retrieving these elements. This can be done using the 'children' method.
Example:
$sxml = simplexml_load_string($xml);
$dcData = $sxml->children('dc', TRUE);
echo (string)$dcData->creator;
An article/posting detailing the problem and solution can be found here.
http://blogs.sitepoint.com/simplexml-and-namespaces/
来源：https://stackoverflow.com/questions/5899747/php-simplexml-issue