我正在调用以下API网址:https://api.gemini.com/v1/trades/btcusd?timestamp=1518710400&limit_trades=1
返回以下JSON:
[
{
"timestamp":1518710409,
"timestampms":1518710409004,
"tid":3051346543,
"price":"9837.17",
"amount":"0.00118501",
"exchange":"gemini",
"type":"sell"
}
]
当我尝试从json字符串访问'price'对象时,如下所示:
$response = $client->request('GET', 'https://api.gemini.com/v1/trades/btcusd?timestamp=1518710400&limit_trades=1');
$body = json_decode($response->getBody());
var_dump()
返回:
array(1) { [0]=> object(stdClass)#85 (7) { ["timestamp"]=> int(1518710409) ["timestampms"]=> float(1518710409004) ["tid"]=> float(3051346543) ["price"]=> string(7) "9837.17" ["amount"]=> string(10) "0.00118501" ["exchange"]=> string(6) "gemini" ["type"]=> string(4) "sell" } }
但我收到以下错误:
Notice: Trying to get property of non-object in (file path) on line 130
第130行
echo $body->price
为什么$body->price
不是JSON字符串返回的'price'的有效访问者?
答案 0 :(得分:2)
$ body是一个数组,所以你需要执行以下操作,因为它是该数组中的第一个项目:
$body[0]->price;