gistfile1.txt

<?php

$request = new HttpRequest();
$request->setUrl('http://54.191.139.107/api/v2/orders');
$request->setMethod(HTTP_METH_GET);

$request->setHeaders(array(
  'postman-token' => '39854a92-b45c-429d-d68b-17cf1c522be1',
  'cache-control' => 'no-cache',
  'authorization' => 'abcdefghijk',
  'content-type' => 'application/json'
));

try {
  $response = $request->send();

  echo $response->getBody();
} catch (HttpException $ex) {
  echo $ex;
}