How to Send a POST Request in PHP: 4 Working Methods with Examples

How to Send a POST Request in PHP: From Beginner to Pro

Have you ever encountered a situation where your PHP script needs to "talk" to another server? Send form data, call an external API, or just check if a remote endpoint is working? If so, you've probably wondered: "How do I send a POST request with PHP?". This is one of the most popular questions on Stack Overflow, and for good reason — server-to-server interaction is the foundation of the modern web.

In this article, we'll cover four proven ways to send a POST request in PHP. You'll learn how to do it using cURL, file_get_contents, stream_context_create, and the powerful Guzzle HTTP client. We won't just show code — we'll explain which method to choose for your task and how to avoid common mistakes.

Let's go! 🚀

What is a POST Request and Why Do You Need It in PHP?

POST is one of the HTTP protocol methods designed for sending data to a server. Unlike GET, where parameters are visible in the URL, POST transmits data in the request body. This is convenient when you need to:

• Submit a registration or order form;
• Call a REST API (e.g., create a new record in a CRM);
• Upload a file to a remote server;
• Authenticate with a third-party service.

PHP doesn't have a built-in "sendPostRequest()" function, but it has several flexible tools that allow you to do this. Let's look at each of them.

Method 1: cURL — The Universal Soldier

cURL (Client URL Library) is arguably the most popular way to send HTTP requests in PHP. It supports a ton of protocols, can handle SSL, cookies, timeouts, and proxies. If you're writing something more serious than a learning script — take a closer look at cURL.

Simple POST Request with cURL

Here's a basic example that sends a POST request to the JSONPlaceholder test server and outputs the response:

// 1. Create a new cURL resource$ch = curl_init();

// 2. Set the endpoint URLcurl_setopt($ch, CURLOPT_URL, "https://jsonplaceholder.typicode.com/posts");

// 3. Specify that this is a POST requestcurl_setopt($ch, CURLOPT_POST, 1);

// 4. Pass the data (PHP array is automatically converted to a query string)curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([    'title' => 'My first post',    'body' => 'This is the post body',    'userId' => 1]));

// 5. Return the result instead of outputting it directlycurl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// 6. Execute the request$response = curl_exec($ch);

// 7. Check for errorsif (curl_errno($ch)) {    echo 'cURL error: ' . curl_error($ch);} else {    // 8. Close the connection    curl_close($ch);    // 9. Output the result    echo $response;}

POST with JSON and Headers

Modern APIs most often work with JSON. Here's how to send JSON data and set the correct Content-Type header:

$data = [    'email' => 'user@example.com',    'password' => 'secret123'];

$ch = curl_init('https://api.example.com/login');curl_setopt($ch, CURLOPT_POST, 1);curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));curl_setopt($ch, CURLOPT_HTTPHEADER, [    'Content-Type: application/json',    'Accept: application/json']);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); // Get the HTTP response code

curl_close($ch);

if ($httpCode === 200) {    $result = json_decode($response, true);    print_r($result);} else {    echo "Error: HTTP $httpCode";}

Why cURL? It gives you full control: you can set a timeout (CURLOPT_TIMEOUT), follow redirects (CURLOPT_FOLLOWLOCATION), send a file (CURLFile), and even work with FTP. The only downside is that the code can be verbose.

Meth