在php中快速提取xml标签的内容

Question

Scribd的API返回XML，例如：

<?xml version="1.0" encoding="UTF-8"?><rsp stat="ok"><thumbnail_url>http://imgv2-4.scribdassets.com/img/word_document/60906103/111x142/79c5e6bab7/1327030759</thumbnail_url></rsp>

有没有办法快速，比如用一两行来获取thumbnail_url的内容，即http://imgv2-4.scribdassets.com/img/word_document/60906103/111x142/79c5e6bab7/1327030759？

Answer 1

$xml = simplexml_load_string($string_data);
$url = (string) $xml->thumbnail_url;