PHP file_get_contents not working correctly - php

Question

I asked a question on here yesterday and was given the following code.
<?php
function usd_rate(){
$json = file_get_contents("https://bitpay.com/api/rates");
$obj = json_decode($json);
if($obj->code == 'USD') return $o->rate;
}
echo usd_rate()
?>
It worked fine at first, but I left my shared hosting and moved to a dedicated server host.
I have checked the PHP.ini to ensure the below
; Whether to allow the treatment of URLs (like http:// or ftp://) as files.
; http://php.net/allow-url-fopen
allow_url_fopen = On
; Whether to allow include/require to open URLs (like http:// or ftp://) as fil$
; http://php.net/allow-url-include
allow_url_include = On
but it still doesnt show any of the values. I have been stuck on this for about 2 hours now so I thought it might be a wise idea to ask for help.
Thanks for any you can provide me.
Also
Output of php --version
PHP 5.5.9-1ubuntu4.4 (cli) (built: Sep 4 2014 06:56:34)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies
with Zend OPcache v7.0.3, Copyright (c) 1999-2014, by Zend Technologies
Not sure what my last host was running

Answer 1

there is error in code u have given try this code
function usd_rate(){
$json = file_get_contents("https://bitpay.com/api/rates");
$obj = json_decode($json);
foreach($obj as $o)
if($o->code == 'USD') return $o->rate;
}
echo usd_rate();