通过 PHP 从端点返回“null”答案

【问题标题】：Returning "null" from endpoint by PHP通过 PHP 从端点返回“null”
【发布时间】：2021-02-17 12:32:15
【问题描述】：

朋友们，我遇到了PHP返回端点https://api.bcb.gov.br/dados/serie/bcdata.sgs.4390/dados的问题。

在POSTMAN中可以正常使用，浏览器也正常。

问题出在哪里？

$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.bcb.gov.br/dados/serie/bcdata.sgs.4390/dados",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => array(
    "Authorization: Basic YXRoZW5hc3g6QHRoZW5hc1g=",
    "Cookie: cookie_p=!scLarubhqjnExZBkmDwhOLi4iPSDyREMccf7/KajFSUEMTzB5Ayusi5+tGpJHXS2/gAiOR1B3EXRVmA=; TS01799025=0198c2d644c9f142b44ab6191be6416ca09c966281b4eac2e338095e981a329beb85787a3328474ab13c2f09d86baa6627e734caa34ceb49d8e51f2f880c249de254c0daa1"
  ),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;

感谢

【问题讨论】：

标签： php curl browser postman

【解决方案1】：

从邮递员和浏览器它正在工作，因为您正在通过 https 安全连接加载代码和文件。如果您在 http 或 localhost 上执行此操作，则必须添加 CURLOPT_SSL_VERIFYPEER => false 和 CURLOPT_USERAGENT => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)' 以模拟浏览器并返回结果。但是使用 CURLOPT_SSL_VERIFYPEER => false 并不是很聪明，而且会让你不安全，更多关于该选项和其他 curl 选项的信息可以在这里阅读https://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTSSLVERIFYPEER

这是我在本地主机上测试的代码

$curl = curl_init();
curl_setopt_array($curl, array(
   CURLOPT_URL => "https://api.bcb.gov.br/dados/serie/bcdata.sgs.4390/dados",
   CURLOPT_RETURNTRANSFER => true,
   CURLOPT_ENCODING => "",
   CURLOPT_MAXREDIRS => 10,
   CURLOPT_TIMEOUT => 0,
   CURLOPT_FOLLOWLOCATION => true,
   CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
   CURLOPT_CUSTOMREQUEST => "GET",
   CURLOPT_HTTPHEADER => array(
      "Authorization: Basic YXRoZW5hc3g6QHRoZW5hc1g=",
      "Cookie: cookie_p=!scLarubhqjnExZBkmDwhOLi4iPSDyREMccf7/KajFSUEMTzB5Ayusi5+tGpJHXS2/gAiOR1B3EXRVmA=; TS01799025=0198c2d644c9f142b44ab6191be6416ca09c966281b4eac2e338095e981a329beb85787a3328474ab13c2f09d86baa6627e734caa34ceb49d8e51f2f880c249de254c0daa1"
   ),
   // those 2 lines added
   CURLOPT_USERAGENT => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)',
   CURLOPT_SSL_VERIFYPEER => false,
));
$response = curl_exec($curl);
curl_close($curl);

// decode response 
$obj = json_decode($response);
// output result
var_dump($obj);

【讨论】：