PHP Manual: DOMDocument::loadXML

public function DOMDocument::loadXML(string $source, int $options = 0): bool

Loads an XML document from a string.

Returns true on success or false on failure.

Throws a ValueError if source is an empty string.

Version	Description
8.3.0	This function now has a tentative bool return type.
8.0.0	Passing an empty string as `source` now throws a ValueError; previously, an `E_WARNING` was raised and `false` was returned.
8.0.0	Calling this function statically will now throw an Error. Previously, an `E_DEPRECATED` was raised.

Example #1 Creating a Document

<?php
$doc = new DOMDocument();
$doc->loadXML('<root><node/></root>');
echo $doc->saveXML();
?>

DOMDocument::loadXML