通过PHP从URL获取JSON [英] Get JSON from a URL by PHP

问题描述

我有一个返回如下JSON对象的URL:

{ "USD":{"15m":7809.0，"last":7809.0，"buy":7809.85，"sell":7808.15，"symbol":"$"}， "AUD":{"15m":10321.42，"last":10321.42，"buy":10322.54，"sell":10320.3，"symbol":"$"}， }

URL: https://blockchain.info/ticker 更多信息: https://blockchain.info/api/exchange_rates_api

我想从第一行获取所有数据并回显它，并让它不断请求它，以便其实时显示

我已经在git hub上使用了示例 https://github.com/blockchain/api-v1-client-php/blob/master/docs/rates.md 但它会显示所有数据输出，您必须刷新它才能更新

请让我指出正确的方向

理想情况下，我最终会得到类似 15 m最后买入卖出 美元($)7794.87 7794.87 7795.72 7794.02

我有表和要去的数据，但它回显了整个数据集而不是第一行，而且我也不知道如何选择单个字段

如何通过PHP做到这一点?

解决方案

您需要的是一个请求php页面，它将使:

1-从站点获取数据:

$data = file_get_contents('https://blockchain.info/ticker');

2-解码json

$decodedData = json_decode($data);

3-在这里您可以使用OOP来访问它:

var_dump($decodedData->USD);

这里的重点是根据需要检索数据，例如，您可以将其与HTML混合在表中.

然后，您需要一个JS脚本，该脚本将使用setInterval执行一个函数，每隔几毫秒.该函数应该向您先前创建的PHP页面发出请求，获取该数据并使用更新后的数据进行更改.

I have a URL that returns a JSON object like this:

{ "USD" : {"15m" : 7809.0, "last" : 7809.0, "buy" : 7809.85, "sell" : 7808.15, "symbol" : "$"}, "AUD" : {"15m" : 10321.42, "last" : 10321.42, "buy" : 10322.54, "sell" : 10320.3, "symbol" : "$"}, }

URL : https://blockchain.info/ticker more info : https://blockchain.info/api/exchange_rates_api

I want to get all the data from the first line and echo it and to have it keep requesting it so its live

I have used the examples on git hub https://github.com/blockchain/api-v1-client-php/blob/master/docs/rates.md but it displays all of the data output and you have to refresh it to get it updated

please can some one point me in the right direction

ideally I would end up with something like 15 m Last Buy Sell USD ($) 7794.87 7794.87 7795.72 7794.02

I have the table and data going to the table but its echoing the whole data set rather than the first line and also I dont know how to select individual fields

How can I do it through PHP?

解决方案

What you need is a request php page, which will make:

1 - Get data from te site:

$data = file_get_contents('https://blockchain.info/ticker');

2 - decode the json

$decodedData = json_decode($data);

3 - Here you can access it using OOP:

var_dump($decodedData->USD);

The point here will be to retrieve data as you wish, you can mix it up with HTML in a table for example.

Then, you need a JS script, that will execute a function with setInterval, each few miliseconds. That function should make a request to a PHP page that you created earlier, get that data and change with the updated one.

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