Zend Diactoros is a PHP library that provides implementations of the PSR-7 HTTP message interfaces. It offers a set of classes for handling HTTP requests and responses, making it easier to work with HTTP messages in PHP applications. Diactoros is part of the Zend Framework but can be used independently in any PHP project.

Pros

• Fully compliant with PSR-7 HTTP message interfaces
• Easy to integrate with existing PHP projects
• Well-documented and maintained
• Provides factory methods for creating server-side requests and responses

Cons

• Learning curve for developers new to PSR-7
• May be overkill for simple projects that don't require full HTTP message abstraction
• Requires PHP 7.1 or later, which might be an issue for older projects

Code Examples

Creating a server request:

use Zend\Diactoros\ServerRequestFactory;

$request = ServerRequestFactory::fromGlobals();

Creating a response:

use Zend\Diactoros\Response;

$response = new Response();
$response = $response->withStatus(200)
    ->withHeader('Content-Type', 'text/html');
$response->getBody()->write('<h1>Hello, World!</h1>');

Handling file uploads:

use Zend\Diactoros\UploadedFile;

$uploadedFile = new UploadedFile(
    '/tmp/php1234.tmp',
    100,
    UPLOAD_ERR_OK,
    'example.txt',
    'text/plain'
);

Getting Started

To use Zend Diactoros in your project, first install it via Composer:

composer require zendframework/zend-diactoros

Then, you can start using it in your PHP code:

use Zend\Diactoros\ServerRequestFactory;
use Zend\Diactoros\Response;

$request = ServerRequestFactory::fromGlobals();
$response = new Response();

// Handle the request and modify the response
$response = $response->withStatus(200)
    ->withHeader('Content-Type', 'application/json');
$response->getBody()->write(json_encode(['message' => 'Hello, World!']));

// Send the response
(new \Zend\Diactoros\Response\SapiEmitter())->emit($response);

This example creates a server request from global variables, creates a response, sets its status and content type, writes a JSON body, and then emits the response using the SAPI emitter.