(PHP 5, PHP 7, PHP 8)
DOMDocument::loadXML — Load XML from a string
Loads an XML document from a string.
   成功时返回 true, 或者在失败时返回 false。 If called statically, returns a
   DOMDocument 或者在失败时返回 false.
  
   If an empty string is passed as the source,
   a warning will be generated. This warning is not generated by libxml
   and cannot be handled using libxml's error handling functions.
  
此方法可以被静态调用,但会抛出一个 E_STRICT 错误。
示例 #1 Creating a Document
<?php
$doc = new DOMDocument();
$doc->loadXML('<root><node/></root>');
echo $doc->saveXML();
?>
示例 #2 Static invocation of loadXML
<?php
// Issues an E_DEPRECATED error
$doc = DOMDocument::loadXML('<root><node/></root>');
echo $doc->saveXML();
?>