Auto mapping method parameters to $_POST data (MVC) - php

Question

Imagine I have a URL that loads a controller if the name matches (Ignoring any security issues with this at the moment hehe)
public function Load( $controller, $action = "Index" )
{
require_once( "Controllers/" . $controller . "Controller.php" );
$controllerName = $controller . "Controller";
$loadedController = new $controllerName();
$actionName = "ActionResult_" . $action;
$loadedController->$actionName();
}
Now imagine I want a log in form to send its $_POST details as parameters of the receiving controller launched above:
<?php
class ExcelUploadController extends Controller
{
public function ActionResult_Login( $username = NULL, $password = NULL )
{
// The parameters need to be mapped to the $_POST parameters names probably from the Load method somewhere and pumped in to the $loadedController->$actionName();
$post_username = $username;
$post_password = $password;
$this->ReturnView( "ExcelUpload/Index" );
}
}
?>
But also so that it does not matter what order the parameters are declared, it matches the parameter in the function based on the $_POST key.
How might I go about doing this, any ideas?
So to clarify if this doesn't make sense.. the method might look something like this:
public function Load( $controller, $action = "Index" )
{
require_once( "Controllers/" . $controller . "Controller.php" );
$controllerName = $controller . "Controller";
$loadedController = new $controllerName();
$actionName = "ActionResult_" . $action;
$checkIfPostData = $_POST;
if( isset( $checkIfPostData ) )
{
// Do some funky wang to map the following $loadedController->$actionName();
// with the username and password or any other $_POST keys so that in the calling method, I can grab hold of the $_POST values
}
$loadedController->$actionName();
}

Answer 1

What your are looking for is call_user_func_array()
EDIT, to reply to comment :
You have two options: rewrite all your function so that they accept only one array() as argument and you parse that array for values. A bit fastidious but it can be useful in some cases. Or you can request for the required argument of a function:
// This will create an object that is the definition of your object
$f = new ReflectionMethod($instance_of_object, $method_name);
$args = array();
// Loop trough params
foreach ($f->getParameters() as $param) {
// Check if parameters is sent through POST and if it is optional or not
if (!isset($_POST[$param->name]) && !$param->isOptional()) {
throw new Exception("You did not provide a value for all parameters");
}
if (isset($_POST[$param->name])) {
$args[] = $_POST[$param->name];
}
if ($param->name == 'args') {
$args[] = $_POST;
}
}
$result = call_user_func_array(array($instance_of_object, $method_name), $args);
That way your array will be properly constructed.
You can also add some specific treatment whether a parameter is optional or not (I guess you can understand how to do it from the code I gave you ;)

Answer 2

Since the data is being sent through POST you don't need to pass any parameters to your method:
class ExcelUploadController extends Controller {
private $userName;
private $login;
public function ActionResult_Login() {
$this->userName = $_POST['username'];
$this->login = $_POST['login'];
}
}
Don't forget to sanitize and validate the user input!