phpで郵便番号から住所を取得

$zip = "1530042";
$base_url = "http://zipcloud.ibsnet.co.jp/api/search?zipcode=".$zip."";
$json = file_get_contents($base_url);
print_r('<pre>');
var_dump($json);
print_r('</pre>');
$arr = json_decode($json, true);
echo $arr['results'][0]['address1']. "<br>";
echo $arr['results'][0]['address2']. "<br>";
echo $arr['results'][0]['address3'];

string(293) “{
“message”: null,
“results”: [
{
“address1”: “東京都”,
“address2”: “目黒区”,
“address3”: “青葉台”,
“kana1”: “ﾄｳｷｮｳﾄ”,
“kana2”: “ﾒｸﾞﾛｸ”,
“kana3”: “ｱｵﾊﾞﾀﾞｲ”,
“prefcode”: “13”,
“zipcode”: “1530042”
}
],
“status”: 200
}”
東京都
目黒区
青葉台