Problem using twitch API

API
3 
function twitchAPIRequest($url)
{
        $output = file_get_contents($url);
        return $output;
}



function decodeJ($json)
{
    $decodedJson = json_decode($json);
	$list = "<ul>";
	for($i = 0; $i < $decodedJson->_total-1; $i++)
	{
			$videos = $decodedJson->videos[$i]->_id;
			$preview = $decodedJson->videos[$i]->preview;
			$list.="<li><a href='screen.php?vid={$videos}'><img src={$preview} width='180' height='112'></a></li>" ;
	}
	$list.="</ul>";
	return $list;
}


$json = twitchAPIRequest("https://api.twitch.tv/kraken/channels/MYCHANNEL/videos?broadcasts=true");

The decodeJ function is called from html . I get no response from the api call. It works locally fine