- var_dump: documentation ( source)
<?php
$doc = new DOMDocument;
$doc->loadXML('<root><label>text content</label></root>');
$xpath = new DOMXPath($doc);
$labelElement = $doc->getElementsByTagName('label')->item(0);
var_dump($xpath->evaluate('count(//label[text() = "text content"])'));
$expectedElmt = $doc->createElement('label', 'text content');
var_dump($expectedElement->tagName);