eZ\Publish\Core\FieldType\RichText\SearchField::extractText PHP Метод

    private function extractText(DOMNode $node)
    {
        $text = '';
        if ($node->childNodes) {
            foreach ($node->childNodes as $child) {
                $text .= $this->extractText($child);
            }
        } else {
            $text .= $node->nodeValue . ' ';
        }
        return $text;
    }