$arr 内容
<aaa>
<bbb Value="11111" Type="222"/>
<bbb Value="0000" Type="333"/>
</aaa>
$xml = new \DOMDocument();
$xml->loadXML($arr);
$root = $xml->documentElement;
$nodes = $root->getElementsByTagName("bbb");
//获取type222
$res[$nodes->item(0)->getAttribute('Type')] =$nodes->item(0)->getAttribute('Value');
//获取type333
$res[$nodes->item(1)->getAttribute('Type')] =$nodes->item(1)->getAttribute('Value');