src/SimpleDOM.php
public function dump()
    {
        $dom = new DOMDocument('1.0');
        $dom->preserveWhiteSpace = false;
        $dom->formatOutput = true;
        $dom->loadXML($this->asXML());
        return $dom->saveXML();
    }
public function dump()
    {
        $dom = new DOMDocument('1.0');
        $dom->preserveWhiteSpace = false;
        $dom->formatOutput = true;
        $dom->loadXML($this->asXML());
        return $dom->saveXML();
    }
Dump pretty XML