Smarty with CI4

Ok, I got something working

Well I decided to go with Twig, but I think the same idea will work for Smarty.

Source info: https://twig.symfony.com/doc/3.x/intro.h...-api-usage

First install twig with composer.

Code:

composer require "twig/twig:^3.0"

In BaseController.php

PHP Code:

namespace App\Controllers;
...
use Twig;

abstract class BaseController extends Controller
{
    ...
    protected $twig;

    public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
    {
        // Do Not Edit This Line
        parent::initController($request, $response, $logger);

        // Preload any models, libraries, etc, here.
        $this->initTwig();
    }

    private function initTwig(): void {
        $loader = new Twig\Loader\FilesystemLoader(APPPATH.'Views');
        $this->twig = new Twig\Environment($loader, [
            'cache' => ENVIRONMENT === 'development' ? false : APPPATH.'writable/cache',
            'debug' => ENVIRONMENT === 'development' ? true : false,
        ]);
        $this->twig->addExtension(new \Twig\Extension\DebugExtension()); // add this if you want to run the {{ dump() }} function
    }

    protected function twigRender(string $filename, array $dataArray)  {
        echo $this->twig->render($filename, $dataArray);
    }

} 


Then in your controller

PHP Code:

namespace App\Controllers;

class Test extends BaseController
{
    public function index()
    {
        // echo $this->twig->render('test.twig', ['name' => 'Noel']);
        $this->twigRender('test.twig', ['name' => 'Noel']);
    }
} 


Here, I created twigRender as an alternative to

PHP Code:

echo $this->twig->render('test.twig', ['name' => 'Noel']); 


but it's not required.