wilcorrea/Router.php

## index.php
<?php

define('__APP_ROOT__', __DIR__);

require_once 'vendor/autoload.php';
?>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Meu Curso Legal</title>
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.2.3/css/bulma.min.css" integrity="sha256-F7gqKszCwmz8vhiti+AICU8dLfIEpxzPVihhhGfbbKg=" crossorigin="anonymous" />
    </head>
    <body>
        <nav class="nav has-shadow">
            <div class="container">

                <div class="nav-left">
                    <a class="nav-item is-brand" href="./">
                        <img src="http://fagoc.br/download/a/logo" alt="logo"/>
                    </a>
                </div>

                <div class="nav-right nav-menu">
                    <a class="nav-item" href="./6">Exercio 6</a>
                    <a class="nav-item" href="./7">Exercio 7</a>
                    <a class="nav-item" href="./8">Exercio 8</a>
                </div>
            </div>
        </nav>
        <pre>
        <?php
        use Fagoc\Core\Router;

        $router = new Router();

        $router->get('/exercicio/:exercicio', function($exercicio) {
            var_dump($outra);
            $exercicio = __DIR__ . '/exercicio-' . $exercicio . '/' . 'file.php';
            if (file_exists($exercicio)) {
                require_once $exercicio;
            }
        });

        $router->run();
        ?>
    </pre>
    </body>
</html>

## Router.php
<?php

namespace Fagoc\Core;

class Router
{
    private $method = 'GET';
    private $uri = '';

    /**
    * routes[
    *  'GET' => [
    *    '/' => 'faço isso',
    *    '/exercicio/6' => 'carregar o arquivo do exercicio 6'
    *    ]
    * ]
    */
    private $routes = [];

    public function __construct($uri = null, $method = null)
    {
        if (!is_null($uri)) {
            $this->uri = $uri;
        }
        if (!is_null($method)) {
            $this->method = $method;
        }

        $this->parseRequest();
    }

    private function parseRequest()
    {
        $self = isset($_SERVER['PHP_SELF']) ? $_SERVER['PHP_SELF'] : '';
        $peaces = explode('/', $self);
        array_pop($peaces);

        $start = implode('/', $peaces);
        $request_uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
        $search = '/' . preg_quote($start, '/') . '/';
        $uri = preg_replace($search, '', $request_uri, 1);

        $this->uri = $uri;
        $this->method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : $this->method;
    }

    public function __call($name, $arguments)
    {
        $method = strtoupper($name);
        if (!isset($this->routes[$method])) {
            $this->routes[$method] = [];
        }
        $peaces = explode('/', $arguments[0]);
        foreach ($peaces as $key => $value) {
            if (strpos($value, ':') === 0) {
                $peaces[$key] = '(\w+)';
            }
        }
        $pattern = str_replace('/', '\/', implode('/', $peaces));
        $route = '/^' . $pattern . '$/';
        $callback = $arguments[1];

        $this->routes[$method][$route] = $callback;
    }

    public function run()
    {
        $routes = $this->routes[$this->method];
        foreach($routes as $route => $callback) {
            if (preg_match($route, $this->uri, $params)) {
                //$route === $this->uri
                array_shift($params);
                return call_user_func_array($callback, array_values($params));
            }
        }
    }
}
	<?php

	define('__APP_ROOT__', __DIR__);

	require_once 'vendor/autoload.php';
	?>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Meu Curso Legal</title>
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.2.3/css/bulma.min.css" integrity="sha256-F7gqKszCwmz8vhiti+AICU8dLfIEpxzPVihhhGfbbKg=" crossorigin="anonymous" />
	</head>
	<body>
	<nav class="nav has-shadow">
	<div class="container">

	<div class="nav-left">
	<a class="nav-item is-brand" href="./">
	<img src="http://fagoc.br/download/a/logo" alt="logo"/>
	</a>
	</div>

	<div class="nav-right nav-menu">
	<a class="nav-item" href="./6">Exercio 6</a>
	<a class="nav-item" href="./7">Exercio 7</a>
	<a class="nav-item" href="./8">Exercio 8</a>
	</div>
	</div>
	</nav>
	<pre>
	<?php
	use Fagoc\Core\Router;

	$router = new Router();

	$router->get('/exercicio/:exercicio', function($exercicio) {
	var_dump($outra);
	$exercicio = __DIR__ . '/exercicio-' . $exercicio . '/' . 'file.php';
	if (file_exists($exercicio)) {
	require_once $exercicio;
	}
	});

	$router->run();
	?>
	</pre>
	</body>
	</html>
	<?php

	namespace Fagoc\Core;

	class Router
	{
	private $method = 'GET';
	private $uri = '';

	/**
	* routes[
	* 'GET' => [
	* '/' => 'faço isso',
	* '/exercicio/6' => 'carregar o arquivo do exercicio 6'
	* ]
	* ]
	*/
	private $routes = [];

	public function __construct($uri = null, $method = null)
	{
	if (!is_null($uri)) {
	$this->uri = $uri;
	}
	if (!is_null($method)) {
	$this->method = $method;
	}

	$this->parseRequest();
	}

	private function parseRequest()
	{
	$self = isset($_SERVER['PHP_SELF']) ? $_SERVER['PHP_SELF'] : '';
	$peaces = explode('/', $self);
	array_pop($peaces);

	$start = implode('/', $peaces);
	$request_uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
	$search = '/' . preg_quote($start, '/') . '/';
	$uri = preg_replace($search, '', $request_uri, 1);

	$this->uri = $uri;
	$this->method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : $this->method;
	}

	public function __call($name, $arguments)
	{
	$method = strtoupper($name);
	if (!isset($this->routes[$method])) {
	$this->routes[$method] = [];
	}
	$peaces = explode('/', $arguments[0]);
	foreach ($peaces as $key => $value) {
	if (strpos($value, ':') === 0) {
	$peaces[$key] = '(\w+)';
	}
	}
	$pattern = str_replace('/', '\/', implode('/', $peaces));
	$route = '/^' . $pattern . '$/';
	$callback = $arguments[1];

	$this->routes[$method][$route] = $callback;
	}

	public function run()
	{
	$routes = $this->routes[$this->method];
	foreach($routes as $route => $callback) {
	if (preg_match($route, $this->uri, $params)) {
	//$route === $this->uri
	array_shift($params);
	return call_user_func_array($callback, array_values($params));
	}
	}
	}
	}