How to use cURL to get JSON data and decode it in PHP

In the previous article "How to use PHP to receive POST JSON data", I introduced to you the processing method of PHP receiving POST JSON data. Friends in need can learn about it~

This article will continue to introduce PHP JSON related knowledge. As mentioned in the title, I will introduce to you how PHP uses cURL to obtain JSON data and decode it. If you are interested, you can continue reading~

First of all A brief introduction to cURL ↓[Related recommendations: php curl sending request detailed tutorial]

→cURL:

• means "client URL", the c in curl means client, and URL is URL.

• It is a command line tool for sending and getting files using URL syntax.

• cURL allows communication with other servers using HTTP, FTP, Telnet, etc.

The code example of PHP using cURL to obtain JSON data and decode it is as follows:

<?php
  
// curl初始化
$curl = curl_init();
    
// 在服务器中获取JSON数据
curl_setopt($curl, CURLOPT_URL, 
    "https://reqres.in/api/users?page=2");
    
// 将JSON数据存储在一个变量中
curl_setopt($curl, 
    CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($curl);
  
// 检查在请求过程中是否发生错误
if($e = curl_error($curl)) {
    echo $e;
} else {
      
    // 解码JSON数据
    $decodedData = 
        json_decode($response, true); 
          
    // 以解码形式输出JSON数据
    var_dump($decodedData);
}
  
curl_close($curl);

Instructions for the implementation steps in the above code:

• We first obtain JSON data from a website. The website in the example provides JSON data for testing, which is reqres.in;

• Then we use curl_init() Method initialize curl;

• Then use the curl_setopt() method with CURLOPT_URL to send a GET request to the reqres.in server to obtain json data;

• After that, we tell curl to store the json data in a variable, this is done by using CURLOPT_RETURNTRANSFER# in the curl_setopt() function ## Parameters to complete;

• Then use the

  curl_exec() method to execute curl;

• Finally, use

  curl_close() Method closes curl.

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