<?php

class Qs_Dom
{
    public static function htmlToText($html)
    {
        $html = mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8');
        $document = new DOMDocument();
        $document->loadHTML($html);
        return Qs_Dom::getTextFromNode($document);
    }

    public static function getTextFromNode(DOMNode $node)
    {
        $text = '';
        if ($node instanceof DOMText) {
            return $text . $node->textContent;
        }
        $node = $node->firstChild;
        if ($node != null) {
            $text .= Qs_Dom::getTextFromNode($node);
        }
        while ($node->nextSibling != null) {
            $text .= Qs_Dom::getTextFromNode($node->nextSibling);
            $node = $node->nextSibling;
        }
        return $text;
    }
}