Symfony Cheat Sheet

// src/Controller/ProductController.php
namespace App\Controller;

// ...
use App\Entity\Product;
use Doctrine\Persistence\ManagerRegistry;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class ProductController extends AbstractController
{
    #[Route('/product', name: 'create_product')]
    public function createProduct(ManagerRegistry $doctrine): Response
    {
        $entityManager = $doctrine->getManager();

        $product = new Product();
        $product->setName('Keyboard');
        $product->setPrice(1999);
        $product->setDescription('Ergonomic and stylish!');

        // tell Doctrine you want to (eventually) save the Product (no queries yet)
        $entityManager->persist($product);

        // actually executes the queries (i.e. the INSERT query)
        $entityManager->flush();

        return new Response('Saved new product with id '.$product->getId());
    }
}

<?php 
namespace App\Controller;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class NomDuControleurController {

  /**
   * @Route(
   *      "/chemin_de_url/{param1}}", 
   *      name="nom_de_la_route", 
   *      methods={"GET", "POST","HEAD","PUT",etc}, 
   *      requirements={"param1":"regexpVoulue" }, 
   *      defaults={"param1":"ValeurParDefaut"}
   *      host="my.host"
   *      schemes={"http", "https"}
   *      priority=1
   * )
   */
  public function nomTraitement($param1 ): Response {
     // ...

     return $this->render('nom_rep_template/nom_du_template.html.twig', [
            'nomDuParametre' => $valeur_du_parametre,
            'param1' $param1,
        ]);
  }
}