Get certain information from JSON_DECODE - php

Question

I'm trying to explain this as best as I can, please ask i'm im unclear about something.
I'm using a API where i get a bunch of information about a sensor.
This is a method in a class
public function getSensors()
{
$params = array();
return json_decode($this->consumer->sendRequest(constant('REQUEST_URI').'/sensors/list', $params, 'GET')->getBody());
And in my index.php
$params = array('id'=> XXXXXX);
$response = $consumer->sendRequest(constant('REQUEST_URI').'/sensor/info', $params,'GET');
echo json_decode($response->getBody());
This gives me a chunk of information like this:
{"id":"xxxxx","client":"xxxx","name":"xxxxx","lastUpdated": xxxx}
I only want to use some of this information.
This is the getBody() method-
public function getBody() {
if (self::METHOD_POST == $this->method && (!empty($this->postParams) || !empty($this->uploads))) {
if (0 === strpos($this->headers['content-type'], 'application/x-www-form-urlencoded')) {
$body = http_build_query($this->postParams, '', '&');
if (!$this->getConfig('use_brackets')) {
$body = preg_replace('/%5B\d+%5D=/', '=', $body);
}
// support RFC 3986 by not encoding '~' symbol (request #15368)
return str_replace('%7E', '~', $body);
} elseif (0 === strpos($this->headers['content-type'], 'multipart/form-data')) {
require_once 'HTTP/Request2/MultipartBody.php';
return new HTTP_Request2_MultipartBody(
$this->postParams, $this->uploads, $this->getConfig('use_brackets')
);
}
}
return $this->body;
}

Answer 1

If you're using an API you can't control what information you get unless the API defines a method to do so. If you're reading sensors then it's unlikely that will be an option.
Nevertheless, you can just ignore what you don't need.
For example:
$myArray = json_decode('{"id":"xxxxx","client":"xxxx","name":"xxxxx","lastUpdated": xxxx}');
$mySubset = array($myArray['id'], $myArray['lastUpdated']);
I just use json_decode to illustrate the point. From your comments it looks like getBody() is returning an array, but the error message you report points to an object.
For an array you can use
$myResp = $response->getBody();
$myId = $myResp['id'];
For an object you can use
$myResp = $response->getBody();
$myId = $myResp->id;
Apologies if I don't quite hit the mark - I'm firing a little blind here!