(PHP 5 >= 5.2.0)
XMLReader::readOuterXML — Retrieve XML from current node, including it self
Reads the contents of the current node, including the node itself.
此函数没有参数。
Returns the contents of current node, including itself, as a string. Empty string on failure.
此函数仅在 PHP 与 libxml 20620 或以上版本编译时可用。