如何显示此字符串中的键值？

Question

这是我的JSON数据

{"subtotal":{"amount":"403.95","currency":"USD"},"fees":[{"coinbase":{"amount":"4.04","currency":"USD"}},{"bank":{"amount":"0.15","currency":"USD"}}],"total":{"amount":"408.14","currency":"USD"},"amount":"408.14","currency":"USD"}

我只需要显示＆＃34;金额＆＃34;关键，我试图解析json ..我是否正确地解决了这个问题？

Answer 1

这样做

<?php
$str='{"subtotal":{"amount":"403.95","currency":"USD"},"fees":[{"coinbase":{"amount":"4.04","currency":"USD"}},{"bank":{"amount":"0.15","currency":"USD"}}],"total":{"amount":"408.14","currency":"USD"},"amount":"408.14","currency":"USD"}';
$arr=json_decode($str,true);

echo $arr['subtotal']['amount'];

Answer 2

试试这个

$jsondata = '{"subtotal":{"amount":"403.95","currency":"USD"},"fees":[{"coinbase":{"amount":"4.04","currency":"USD"}},{"bank":{"amount":"0.15","currency":"USD"}}],"total":{"amount":"408.14","currency":"USD"},"amount":"408.14","currency":"USD"}';$jsondata1 = json_decode($jsondata);echo $jsondata1->amount;echo $jsondata1->subtotal->amount;