How to upload a file to a remote server using Guzzle in PHP?

To upload a file to a remote server using Guzzle in PHP, follow these steps:

Install Guzzle via Composer. Run the following command in your project folder:

composer require guzzlehttp/guzzle

Create a PHP script and include the Guzzle autoloader at the top:

require 'vendor/autoload.php';

Initialize a Guzzle client:

$client = new GuzzleHttp\Client();

Define the file path and the remote server URL:

$file_path = '/path/to/file.jpg';
$server_url = 'http://example.com/upload.php';

Create a Guzzle POST request and attach the file:

$response = $client->post($server_url, [
    'multipart' => [
        [
            'name'     => 'file',
            'contents' => fopen($file_path, 'r'),
        ],
    ]
]);

In the code above, 'file' is the name of the file input field expected by the remote server. You can adjust it according to your server's requirements.

Handle the response:

if ($response->getStatusCode() == 200) {
    echo 'File uploaded successfully!';
} else {
    echo 'Upload failed!';
}

The above code checks if the response status code is 200 to determine if the upload was successful.

That's it! You have successfully uploaded a file to a remote server using Guzzle in PHP.