Twitcastingから情報を取得(php)

↓のphp版
http://checker-site.hatenablog.com/entry/2015/11/20/162002

<?php
$url_base = "http://api.twitcasting.tv/api/livestatus?user=";
$twitcasting_id = "test";
$url = $url_base . $twitcasting_id . "&type=json";//デフォルトはjsonpなのでjsonに変換


$json = file_get_contents($url);
$contents = json_decode($json, true);

//print_r($json);
var_dump($contents);
$isLive = $contents['islive'];
$protected = $contents['protected'];
$movieid = $contents['movieid'];
$comments = $contents['comments'];
$viewers = $contents['viewers'];
$total = $contents['total'];
$duration = $contents['duration'];
$subtitle = $contents['subtitle'];
$typing = $contents['typing'];
$hashtag = $contents['hashtag'];
$title = $contents['title'];