How Can I Use PHP cURL to Send an HTTP POST Request?

PHP cURL with HTTP POST

Introduction

cURL is a library used in PHP for transferring data over a network. One common use case for cURL is to send HTTP POST requests. This article provides an example of how to use cURL in PHP to send an HTTP POST request to a remote site.

Problem

A user needs to send data to a remote site using an HTTP POST request. The data includes username, password, and gender. The user expects a response from the remote site indicating whether the operation was successful.

Solution

To send an HTTP POST request using cURL in PHP, follow these steps:

// Initialize a cURL handle
$ch = curl_init();

// Set the URL to which the request should be sent
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/tester.phtml");

// Specify that the request is a POST request
curl_setopt($ch, CURLOPT_POST, true);

// Set the POST fields
curl_setopt($ch, CURLOPT_POSTFIELDS, 
          http_build_query(array('username' => 'user1', 'password' => 'passuser1', 'gender' => 1)));

// Receive server response
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Execute the request and get the server response
$server_output = curl_exec($ch);

// Close the cURL handle
curl_close($ch);

// Further processing
if ($server_output == "OK") { ... } else { ... }

This script will send a POST request to the specified URL with the provided data. The server response is stored in the $server_output variable and can be further processed as needed.

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