how to fix this problem(Array to string conversion) - php

Question

this is my url http://localhost/mymvc/index.php?url=controller/method
I want to catch 'method' by $_GET Super Global Variable and get access class of Controller method.
I want to get all method dynamic way
Here is my index file code.
<?php
include 'inc/header.php';
include_once 'system/libs/MController.php';
include_once 'system/libs/Main.php';
$url = $_GET['url'];
$url = rtrim($url, '/');
$url = explode("/", $url);
include 'app/controllers/'.$url[0].'.php';
$ctlr = new $url[0]();
$ctlr->$url[1](); //---->(1) here is problem. I can't access my method this way
include 'inc/footer.php';
?>
Here is my Controller.php file code
<?php
/**
* controller
*/
class Controller extends MController{
public function __construct(){
// parent::__construct();
}
public function method(){
echo "Mohammad Arman from method";
}
}
?>
But when I show this output. Showing below this error and notice
**
1)Notice: Array to string conversion in
C:\Users\USER\Documents\wamp\www\mymvc\index.php on line 15
2)Notice: Undefined property: Controller::$Array in
C:\Users\USER\Documents\wamp\www\mymvc\index.php on line 15
3)Fatal error: Uncaught Error: Function name must be a string in
C:\Users\USER\Documents\wamp\www\mymvc\index.php:15 Stack trace: #0
{main} thrown in C:\Users\USER\Documents\wamp\www\mymvc\index.php on
line 15**

Answer 1

You need to make sure the name you are using as the function name is properly delimited,
$ctlr->$url[1]();
could be interpreted as $ctlr->$url and then [1], but what you really want is...
$ctlr->{$url[1]}();