$xmlstr = file_get_contents("[XMLファイル名]");

if(!$dom = domxml_open_mem($xmlstr))
{
    echo "Error while parsing the document\n";
    exit;
}

$root = $dom->document_element();
$childnodes = $root->child_nodes();

foreach ($childnodes as $value)
{
    $nodeArray[$value->tagname] = $value->get_content();
    $chnode = $value->child_nodes();

    foreach($chnode as $v)
    {
        echo $v->tagname . " : " . $v->get_content() . "<br />";
    }

    echo "<br />";
}