<?php
$dom = new domDocument;
$dom->loadHTML('<div class="news"> ... some text ... </div>');
$xpath = new DOMXPath($dom);
$results = $xpath->query("//div[@class='news']");
echo $dom->saveHTML($results[0]);
PD9waHAKCiRkb20gPSBuZXcgZG9tRG9jdW1lbnQ7CiRkb20tPmxvYWRIVE1MKCc8ZGl2IGNsYXNzPSJuZXdzIj4gLi4uIHNvbWUgdGV4dCAuLi4gPC9kaXY+Jyk7CgokeHBhdGggPSBuZXcgRE9NWFBhdGgoJGRvbSk7CiRyZXN1bHRzID0gJHhwYXRoLT5xdWVyeSgiLy9kaXZbQGNsYXNzPSduZXdzJ10iKTsKCmVjaG8gJGRvbS0+c2F2ZUhUTUwoJHJlc3VsdHNbMF0pOyA=