I have started learning Symfony2. I came across a doubt: if I have this route:
# app/config/routing.yml
hello:
path: /hello/{name}
defaults: { _controller: AcmeHelloBundle:Hello:index }
And this controller:
// src/Acme/HelloBundle/Controller/HelloController.php
namespace Acme\HelloBundle\Controller;
use Symfony\Component\HttpFoundation\Response;
class HelloController
{
public function indexAction($name)
{
return new Response('<html><body>Ciao '.$name.'!</body></html>');
}
}
Internally Symfony2 (inside app/bootstrap.php.cache) calls the call user_func_array() PHP built-in function:
$arguments = $this->resolver->getArguments($request, $controller);
$response = call_user_func_array($controller, $arguments);
And the call to the getArguments() method returns an array of arguments to pass to the action method. But if the controller were:
// src/Acme/HelloBundle/Controller/HelloController.php
namespace Acme\HelloBundle\Controller;
use Symfony\Component\HttpFoundation\Response;
class HelloController
{
public function indexAction($n)
{
return new Response('<html><body>Ciao '.$n.'!</body></html>');
}
}
Symfony would have complained with a RuntimeException because no param $n is set.
My question is: how Symfony controls this behaviour, I mean, if a route has a {name} param, why the controller must have an action method with a $name parameter and the parameter must be called $name?
Cause in plain PHP, this would work:
$name = 'Alex';
function indexAction($n) {
echo $n;
}
$f = 'indexAction';
$arguments = array($name);
call_user_func_array($f, $arguments);
Even if the functions signature accepts a param named as $n and not as $name.
I hope that this question is understandable, if not, please tell me and I will make an edit.
Thanks for the attention!
