Slim 3 render method not valid - php

Question

I want to make simple template rendering in Slim3 but I get an error:
Here is my code :
namespace controller;
class Hello
{
function __construct() {
// Instantiate the app
$settings = require __DIR__ . '/../../src/settings.php';
$this->app = new \Slim\App($settings);
}
public function index(){
return $this->app->render('web/pages/hello.phtml'); //LINE20
}
}
This is the error I get :
Message: Method render is not a valid method

Answer 1

The App object doesn't handle any rendering on its own, you'll need a template add-on for that, probably this one based on your template's .phtml extension. Install with composer:
composer require slim/php-view
Then your controller method will do something like this:
$view = new \Slim\Views\PhpRenderer('./web/pages');
return $view->render($response, '/hello.phtml');
You'll eventually want to put the renderer in the dependency injection container instead of creating a new instance in your controller method, but this should get you started.

Answer 2

I handle this by sticking my renderer in the container. Stick this in your main index.php file.
$container = new \Slim\Container($configuration);
$app = new \Slim\App($container);
$container['renderer'] = new \Slim\Views\PhpRenderer("./web/pages");
Then in your Hello class's file.
class Hello
{
protected $container;
public function __construct(\Slim\Container $container) {
$this->container = $container;
}
public function __invoke($request, $response, $args) {
return $this->container->renderer->render($response, '/hello.php', $args);
}
}
To clean up this code, make a base handler that has this render logic encapsulated for you.