ViewHandler

HtmlHandler.php

<?php

namespace MyApp;

class HtmlHandler implements ViewHandler
{
    public function __invoke(Response $response)
    {
        foreach ($response->getHeaders() as $header)
            header($header);
            
        $response = $response->getData();
        return $response;
    }
}

JsonHandler.php

<?php

namespace MyApp;

class JsonHandler implements ViewHandler
{
    public function __invoke(Response $response)
    {
        header('Content-Type: application/json');
        
        foreach ($response->getHeaders() as $header)
            header($header);
            
        return json_encode($response->getData());
    }
}

Response.php

<?php

namespace MyApp;

class Response
{
    protected $data;
    protected $template;
    protected $headers;
    
    public function __construct(array $data, $template = null)
    {
        $this->data = $data;
        $this->template = $template;
        $this->headers = array();
    }
    
    public function addHeader($header)
    {
        $this->headers[] = $header;
    }
    
    public function getHeaders()
    {
        return $this->headers;
    }
    
    public function getData()
    {
        return $this->data;
    }
}

routes.php

$c = new Respect\Config\Container('application.ini');
$c-router->get('/users', 'MyApp\Controller\Users')
    ->accept(array('.json' => $c->jsonHandler, 'text/html' => $c->htmlHandler));

Users.php

<?php

namespace MyApp\Controller;

use MyApp\Response;
use Respect\Rest\Routable;

class Users implements Routable
{
    public function get()
    {
        $response = new Response(array(
            'users' => array()
        ));
        
        return $response;
    }
}

ViewHandler.php

<?php

namespace MyApp;

interface ViewHandler
{
    public function __invoke(Response $response);
}