public function getConnections($params)
 {
     $connectionLoader = new ConnectionLoader();
     $connections = $connectionLoader->getJSONStream($params);
     return $connections;
 }
<?php

require_once 'controller/ConnectionLoader.php';
$from = 'Bassersdorf';
$to = 'Zurich';
if (isset($_GET['from'])) {
    $from = $_GET['from'];
}
if (isset($_GET['to'])) {
    $to = $_GET['to'];
}
$params = array(0 => $from, 1 => $to, 2 => 6);
// $url = 'http://transport.opendata.ch/v1/connections?from=' . $params[0] . '&to=' . $params[1] . '&limit=' . $params[2];
// echo $url;
// // $json = json_decode(file_get_contents($url));
// $json = file_get_contents($url);
// var_dump($json);
$connectionLoader = new ConnectionLoader();
$connectionLoader->getJSONStream($params);
// var_dump($connectionLoader->getJSONStream($params));