(PHP 5)
DOMDocument::load — Load XML from a file
Loads an XML document from a file.
Unix style paths with forward slashes can cause significant performance degradation on Windows systems; be sure to call realpath() in such a case.
如果成功则返回 TRUE，失败则返回 FALSE。 If called statically, returns a DOMDocument and issues E_STRICT warning.
If an empty string is passed as the filename or an empty file is named, a warning will be generated. This warning is not generated by libxml and cannot be handled using libxml's error handling functions.
Example #1 Creating a Document
<?php
$doc = new DOMDocument();
$doc->load('book.xml');
echo $doc->saveXML();
?>