HTTP Responses

Introduction
All of your WordPress and Router controllers should return a PSR7 compliant response to be sent back to the user's browser. Lumberjack provides a number of Response types which should cover the majority of cases.
If your Controller returns a string it will be automatically converted to an HtmlResponse object with a 200 status code.
Available Response Objects
Timber Response
The most common use-case will be to render a Twig view with some associated data. Using Timber on it's own, your code would look like this:
use Timber\Timber;
​
...
​
return Timber::render('home.twig', $context);
In Lumberjack, you should take advantage of the Rareloop\Lumberjack\Http\Responses\TimberResponse object to achieve the same thing:
use Rareloop\Lumberjack\Http\Responses\TimberResponse;
​
...
​
return new TimberResponse('home.twig', $context);
Context Flattening
When passing context data to TimberResponse, any objects that implement the Rareloop\Lumberjack\Contracts\Arrayable contract will automatically be flattened to a standard PHP array. This means that it is safe to use objects such as Collection and ViewModel in your data without it causing issues with Twig.
View Models
/the-basics/view-models
Collections
/the-basics/collections
Redirect Response
Redirecting to a different URL can be done by returning an instance of Rareloop\Lumberjack\Http\Responses\RedirectResponse.
use Rareloop\Lumberjack\Http\Responses\RedirectResponse;
​
...
​
return new RedirectResponse('/another/page');
Adding Flash Data
If you want to redirect to a URL and also flash some data to the session, you can use the with() method.
return new RedirectResponse('/another/page')
    ->with('error', 'Something went wrong');
Diactoros Responses
Lumberjack also includes the fantastic Zend Diactoros package which provides additional PSR7 compliant Response Objects.
// Check out their documentation for further details and examples:
// https://zendframework.github.io/zend-diactoros/
$response = new Zend\Diactoros\Response\TextResponse('Hello world!');
$response = new Zend\Diactoros\Response\HtmlResponse($htmlContent);
$response = new Zend\Diactoros\Response\XmlResponse($xml);
$response = new Zend\Diactoros\Response\JsonResponse($data);
$response = new Zend\Diactoros\Response\EmptyResponse(); // Basic 204 response:
Adding Status Code & Headers
One of the benefits of using Response Objects is that they make it easier to control the HTTP status code & headers.
All the Response Objects bundled with Lumberjack let you set both the status code and headers in their constructor.
use Zend\Diactoros\Response\JsonResponse;
​
return new JsonResponse($data, 422, ['X-Total-Validation-Errors' => 2]);
Or if you prefer, you can use the withStatus and withHeader methods instead.
use Zend\Diactoros\Response\JsonResponse;
​
return (new JsonResponse($data, 422))
    ->withStatus(422)
    ->withHeader('X-Total-Validation-Errors', 2);
Responsable Objects
In addition to supporting PSR7 compliant responses, Controllers can also return an object that implements the Rareloop\Router\Responsable interface. These objects provide a toResponse() method that will return an instance of a PSR7 Response.
// app/Http/Controllers/TestController.php
namespace App\Http\Controllers;
​
use App\Exceptions\TestException;
​
class TestController
{
    public function show()
    {
        return new TestException('Hello World');
    }
}
​
// app/Exceptions/TestException.php
namespace App\Exceptions;
​
use Rareloop\Router\Responsable;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Zend\Diactoros\Response\JsonResponse;
​
class TestException extends \Exception implements Responsable
{
    protected $reason;
​
    public function __construct($reason)
    {
        $this->reason = $reason;
        parent::__construct();
    }
​
    public function toResponse(RequestInterface $request) : ResponseInterface
    {
        return new JsonResponse([
            'error' => $this->reason,
        ], 400);
    }
}
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HTTP Requests
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Middleware
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