Question

我试图获得price_usd，但我尝试使用此

data["price_usd"]

并没有帮助，所以我想如何获取数据？

json table：

[
    {
        "id": "bitcoin-cash", 
        "name": "Bitcoin Cash", 
        "symbol": "BCH", 
        "rank": "3", 
        "price_usd": "2957.36", 
        "price_btc": "0.211189", 
        "24h_volume_usd": "1339490000.0", 
        "market_cap_usd": "49908111624.0", 
        "available_supply": "16875900.0", 
        "total_supply": "16875900.0", 
        "max_supply": "21000000.0", 
        "percent_change_1h": "-0.09", 
        "percent_change_24h": "2.4", 
        "percent_change_7d": "34.95", 
        "last_updated": "1514247253"
    }
]

Answer 1

首先需要将json文本转换为php数组/对象。

使用此代码作为示例：

<?php
$rawJSon="your long json here"
$data=json_decode($rawJson, true);
echo $data[0]["price_usd"];

Answer 2

假设这是你的JSON字符串：

$raw = <<<EOT
[
    {
        "id": "bitcoin-cash", 
        "name": "Bitcoin Cash", 
        "symbol": "BCH", 
        "rank": "3", 
        "price_usd": "2957.36", 
        "price_btc": "0.211189", 
        "24h_volume_usd": "1339490000.0", 
        "market_cap_usd": "49908111624.0", 
        "available_supply": "16875900.0", 
        "total_supply": "16875900.0", 
        "max_supply": "21000000.0", 
        "percent_change_1h": "-0.09", 
        "percent_change_24h": "2.4", 
        "percent_change_7d": "34.95", 
        "last_updated": "1514247253"
    }
]
EOT;

由于你有一个JSON对象，你需要使用箭头指定一个对象属性（注意你的JSON中的对象花括号）：

$data = json_decode( $raw );
echo $data[0]-> price_usd;

或者您可以解码为数组而不是对象：

$data = json_decode( $raw, TRUE );
echo $data[0]['price_usd'];

使用php获取json的数据

2 个答案: