codice:
<?php

$xml = simplexml_load_file('portfolio.xml');

unset($xml->code->codeItem[0]);


$newXmlText = $xml->asXML();


$dom = new DomDocument();

$dom->loadXML($newXMLText);
$dom->formatOutput = true;
$formatedXML = $dom->saveXML();

$fp = fopen('portfolio.xml','w+');
fwrite($fp, $formatedXML);
fclose($fp);

?>