Extract content from a html using Xpath

xpath.php

<?php 
/**
 * Function to extract content from html. 
 * $html HTML data 
 * $expression Expression used to extract the data ex. //div[@id='breadcrumbs']/span
 */
function extract_content_from_html( $html, $expression ){
	$dom = new DOMDocument();
	$output = '';
	libxml_use_internal_errors( true );
	$dom->loadHTML( $html );
	libxml_clear_errors();
	try{
		$xml    = simplexml_import_dom( $dom );
	} catch(Exception $e) {
		$error =  'Message: ' .$e->getMessage();
		error_log( $error );
	}
	$result = $xml->xpath( $expression );
	$domXPath = new DOMXPath($dom);
	$domNodeList = $domXPath->query($expression);
	$domDocument = new DOMDocument(); 

	if( !empty( $domNodeList ) ): 
		foreach ($domNodeList as $node) {
			$domDocument->appendChild($domDocument->importNode($node, true)); 
		}
		$content = $domDocument->saveHTML(); 
		$output = $content;

	else:
		$output = __( 'No match found.', 'wpscraper' );
	endif;
	return $output;
}