用PHP调用Coinmarketcap

Question

我尝试了我的第一个API调用，但是仍然有问题。我添加了我的API-键，选择了符号，并试图反映价格。但它仍然是无效的。但我的回声仍然是0。也许有人告诉我我做错了什么。谢谢!

    <?php

$coinfeed_coingecko_json = file_get_contents('https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest?symbol=ETH');
$parameters = [
  'start' => '1',
  'limit' => '2000',
  'convert' => 'USD'
];

$headers = [
  'Accepts: application/json',
  'X-CMC_PRO_API_KEY: XXX'
];

$qs = http_build_query($parameters); // query string encode the parameters
$request = "{$url}?{$qs}"; // create the request URL

$curl = curl_init(); // Get cURL resource
// Set cURL options
curl_setopt_array($curl, array(
  CURLOPT_URL => $request,            // set the request URL
  CURLOPT_HTTPHEADER => $headers,     // set the headers 
  CURLOPT_RETURNTRANSFER => 1         // ask for raw response instead of bool
));

$response = curl_exec($curl); // Send the request, save the response
print_r(json_decode($response)); // print json decoded response
curl_close($curl); // Close request

$coinfeed_json = json_decode($coinfeed_coingecko_json, false);

$coinfeedprice_current_price = $coinfeed_json->data->{'1'}->quote->USD->price;


?>
 <?php  echo $coinfeedde = number_format($coinfeedprice_current_price, 2, '.', '');  ?>

API：https://coinmarketcap.com/api/v1/#operation/getV1CryptocurrencyListingsLatest

Answer 1

在您的代码中有很多事情要做。

首先，$json->data[0]->quote->USD->price

• Fourth；未定义json对象(
• )，第二，您发出了两个请求，其中一个请求已删除了
• 第三次请求；您可以通过$url访问json对象，我删除了无效的请求params

。

我改变了一些东西来使它发挥作用：

$url = "https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest";

$headers = [
  'Accepts: application/json',
  'X-CMC_PRO_API_KEY: ___YOUR_API_KEY_HERE___'
];

$request = "{$url}"; // create the request URL

$curl = curl_init(); // Get cURL resource
// Set cURL options
curl_setopt_array($curl, array(
  CURLOPT_URL => $request,            // set the request URL
  CURLOPT_HTTPHEADER => $headers,     // set the headers 
  CURLOPT_RETURNTRANSFER => 1         // ask for raw response instead of bool
));

$response = curl_exec($curl); // Send the request, save the response
$json = json_decode($response);
curl_close($curl); // Close request

var_dump($json->data[0]->quote->USD->price);
var_dump($json->data[1]->quote->USD->price);