<?php
$dom = new DOMDocument;
$dom->loadXML('<div>123 <br /> 456</div>');
$xpath = new DOMXPath($dom);
foreach ($xpath->query('//div/text()') as $textNode) {
echo trim($textNode->nodeValue), PHP_EOL
; }
PD9waHAKCiRkb20gPSBuZXcgRE9NRG9jdW1lbnQ7CiRkb20tPmxvYWRYTUwoJzxkaXY+MTIzIDxiciAvPiA0NTY8L2Rpdj4nKTsKCiR4cGF0aCA9IG5ldyBET01YUGF0aCgkZG9tKTsKZm9yZWFjaCAoJHhwYXRoLT5xdWVyeSgnLy9kaXYvdGV4dCgpJykgYXMgJHRleHROb2RlKSB7CgllY2hvIHRyaW0oJHRleHROb2RlLT5ub2RlVmFsdWUpLCBQSFBfRU9MOwp9