xml字符串，xml对象，数组之间的相互转化

<?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
    public function index(){
        $arr[‘one‘] =‘你好‘;
        $arr[‘two‘] = ‘hi‘;
        $arr[‘three‘] = ‘hello‘;
        $arr[‘four‘] = ‘ahan‘;

        dump($arr);

        //数组转换成xml字符串
        $curl_xml = xml_encode($arr, ‘param‘);
        dump($curl_xml);

        //xml字符串转化成xml对象
        $xml = simplexml_load_string($curl_xml);
        dump($xml);

        //xml对象装换成xml字符串
        $str = $xml->asXML();
        dump($str);

        //xml字符串转化成数组
        $attr = json_decode(json_encode($xml),TRUE);
        dump($attr);

    }
}