How to use cURL to implement Post request in PHP

The method of using cURL to implement Post request in PHP: first initialize [curl_init()]; then set the variable, execute and obtain the result [curl_exec()]; and finally release the cURL handle [curl_close()].

How to use cURL to implement Post request in PHP:

1.cURL introduction

cURL is a tool that uses URL syntax to transfer files and data. It supports many protocols, such as HTTP, FTP, TELNET, etc. The best part is that PHP also supports the cURL library. This article will introduce some advanced features of cURL and how to use it in PHP.

2. Basic structure

Before learning more complex functions, let’s take a look at the basic steps to establish a cURL request in PHP:

　(1) Initialization

　 curl_init()

　 (2) Set variables

　 curl_setopt(). The most important thing is that all mysteries are here. There is a long list of cURL parameters that can be set that specify various details of the URL request. It can be difficult to read and understand them all at once, so today we will only try the more common and useful options.

　(3) Execute and get the results

　　curl_exec()

　　(4) Release the cURL handle

　　curl_close()

3.cURL realizes Post

Post method realizes

The code is as follows:

$url = "http://localhost/web_services.php";
　　$post_data = array ("username" => "bob","key" => "12345");
　　$ch = curl_init();
　　curl_setopt($ch, CURLOPT_URL, $url);
　　curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
　　// post数据
　　curl_setopt($ch, CURLOPT_POST, 1);
　　// post的变量
　　curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
　　$output = curl_exec($ch);
　　curl_close($ch);
　　//打印获得的数据
　　print_r($output);

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