How to render a view in php and twig? - php

Question

I'm creating a webpage where students and teachers log in, teachers create levels and students can do that level.
I explain, I am using php with twig and I want to render a view passing parameters in a function. I've created a budle called Professors where I have the directory Controllers, Models and Templates.
In templates I have professors.html, where I show some information and a button to create a level for students, and also I have crearNivell.html, where the teacher will be able to create the level. When I'm in the page views professors my URL is this one:
When I click the button "CREATE LEVEL" I want my URL to be like this:
Instead I get this URL, and this one returns me an error.
In Controllers/ProfessorsController.php I have that code:
class ProfessorController extends Controller{
public function process($params)
{
/*var_dump($params);
die();*/
if(empty($params[0])){
$this->getProfessor(); //Here I return the view professor
}elseif(isset($params[0]) && $params[0] == "crearNivell"){
$this->twig = "crearNivell.html";
}
}
public function getProfessor(){
$this->twig = "professor.html";
}
}
Can someone help me with my code?
When I use var_dump() I get this:
and it should be like that:

Answer 1

I think what you're looking for is the API of Twig.
More specifically, you need the line below to render a template passing some parameters in array:
echo $template->render(['the' => 'variables', 'go' => 'here']);
If you use PHP the fastest way to "print" some content to the browser is echo, so don't hesitate to use it.

Answer 2

I found the answer to the questions a few days ago. I was complicating myself, it's just like this:
First you create the views, in Templates folder.
The $params are refered to the URL. For example:
alumne is the bundle
AlumneController.php
Then in AlumneController.php put the name of the views without the .html and you show it using $this->twig = "name_Of_The_View.html";
<?php
class AlumneController extends Controller{
public function process($params)
{
/*var_dump($params);
die();*/
if(empty($params[0])){
$this->getAlumne();
/*echo $usuari = $_SESSION["username"];*/
}else if(isset($params[0]) && $params[0] == "instruccions"){
$this->twig = "instruccions.html";
/*echo $usuari = $_SESSION["username"];*/
}else if(isset($params[0]) && $params[0] == "resultats"){
$this->twig = "resultats.html";
/*echo $usuari = $_SESSION["username"];*/
}
}
public function getAlumne(){
$this->twig = "alumne.html";
}
}
alumne.html
And in the button or link you are using to go to the page you write the path in Instruccions
<a class="mdl-navigation__link" href="alumne/instruccions">Instruccions</a>
<a class="mdl-navigation__link" href="alumne/resultats">Resultats</a>