I believe it is written in that manner to handle other types of requests. Like PUT and DELETE because you use a hidden input for those two with a POST method.
/**
* Gets the request "intended" method.
*
* If the X-HTTP-Method-Override header is set, and if the method is a POST,
* then it is used to determine the "real" intended HTTP method.
*
* The _method request parameter can also be used to determine the HTTP method,
* but only if enableHttpMethodParameterOverride() has been called.
*
* The method is always an uppercased string.
*
* @return string The request method
*
* @see getRealMethod()
*/
public function getMethod()
{
if (null === $this->method) {
$this->method = strtoupper($this->server->get('REQUEST_METHOD', 'GET'));
if ('POST' === $this->method) {
if ($method = $this->headers->get('X-HTTP-METHOD-OVERRIDE')) {
$this->method = strtoupper($method);
} elseif (self::$httpMethodParameterOverride) {
$this->method = strtoupper($this->request->get('_method', $this->query->get('_method', 'POST')));
}
}
}
return $this->method;
}
/**
* Gets the "real" request method.
*
* @return string The request method
*
* @see getMethod()
*/
public function getRealMethod()
{
return strtoupper($this->server->get('REQUEST_METHOD', 'GET'));
}
You are able to get all request data with $request->all() no matter which method you choose.