问如何从Guzzlehttp json存储库中删除不需要的字符

EN

$url = "URL to atom feed";
$user = "user";
$pass = "pass";

// using CURL to get our results
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERPWD, $user . ":" . $pass);
$output = curl_exec($ch);
curl_close($ch);

// decoding our results into an associative array
// doing a substring as there are 3 weird characters being passed back from IIS in front of the string
$data = json_decode(substr($output, 3, strlen($output)), true);

// grabbing our results object
$list = $data['$resources'];

<?php

// app/controllers/ScrapeController.php
class ScrapeController extends BaseController {

    public function getIndex() {
        echo "Scrape index page.";
    }

    public function getNode($node) {
        echo "Scraped page $node";
    }

    public function getPages() {
        $client = new GuzzleHttp\Client();
        $res = $client->get('URL to atom feed', ['auth' =>  ['user', 'pass']]);
        echo $res->getStatusCode();
        // "200"
       // echo $res->getHeader('content-type');
        // 'application/json; charset=utf8'
       echo $res->getBody();
        // {"type":"User"...'