An automatic routing without using routing table

.gitignore

@@ -1,3 +1,5 @@
+logs
+!logs/.keep
 vendor
 
 composer.lock

App/Config.php

@@ -34,6 +34,18 @@ class Config
      */
     const DB_PASSWORD = 'your-database-password';
 
+    /**
+     * Default controller value
+     * @var string
+     */
+    const DEFAULT_CONTROLLER = 'Home';
+
+    /**
+     * Default action value
+     * @var string
+     */
+    const DEFAULT_ACTION = 'index';
+
     /**
      * Show or hide error messages on screen
      * @var boolean

App/Controllers/Home.php

@@ -17,7 +17,7 @@ class Home extends \Core\Controller
      *
      * @return void
      */
-    public function indexAction()
+    public function indexAction($params)
     {
         View::renderTemplate('Home/index.html');
     }

Core/Router.php

@@ -9,7 +9,13 @@
  */
 class Router
 {
-
+    /**
+     * Request URI index constants
+     */
+    const CONTROLLER_URI_INDEX = 1;
+    const ACTION_URI_INDEX = 2;
+    const ID_URI_INDEX = 3;
+
     /**
      * Associative array of routes (the routing table)
      * @var array
@@ -131,6 +137,58 @@ public function dispatch($url)
         }
     }
 
+    /**
+     * Dispatch the request URI, creating the controller object
+     * and running the action method with id and other params.
+     * An automatic routing without using routing table
+     *
+     * Request URI format:
+     * [/controller[/action[/id]]][?param1=value1[&param2=value2...]]
+     *
+     * @param string|null $requestUri The request URI
+     * 
+     * @return void
+     */
+    public function dispatchRequest($requestUri = null)
+    {
+        // Parse request URI
+        $requestUri = $requestUri ?? $_SERVER['REQUEST_URI'];
+        [$request, $query] = strpos($requestUri, '?') === false ? [$requestUri, ''] : explode('?', $requestUri);
+        $request = strpos($request, '/') === false ? [] : explode('/', $request);
+        $queryParams = [];
+        parse_str($query, $queryParams);
+
+        // Dispatch request
+        $controller = !empty($request[self::CONTROLLER_URI_INDEX]) ? $request[self::CONTROLLER_URI_INDEX] : \App\Config::DEFAULT_CONTROLLER;
+        $controller = $this->convertToStudlyCaps($controller);
+        $this->params['controller'] = $controller;
+        $controller = $this->getNamespace() . $controller;
+        $action = !empty($request[self::ACTION_URI_INDEX]) ? $request[self::ACTION_URI_INDEX] : \App\Config::DEFAULT_ACTION;
+        $action = $this->convertToCamelCase($action);
+        $this->params['action'] = $action;
+        if ($id = $request[self::ID_URI_INDEX] ?? null) {
+            if (array_key_exists('id', $queryParams)) {
+                $queryParams['id'] = $id;
+            } else {
+                $queryParams = ['id' => $id] + $queryParams;
+            }
+        }
+        $this->params['id'] = $id;
+        $this->params['queryParams'] = $queryParams;
+
+        if (class_exists($controller)) {
+            $controller_object = new $controller($this->params);
+
+            if (preg_match('/action$/i', $action) == 0) {
+                $controller_object->$action($queryParams);
+            } else {
+                throw new \Exception("Method $action in controller $controller cannot be called directly - remove the Action suffix to call this method");
+            }
+        } else {
+            throw new \Exception("Controller class $controller not found");
+        }
+    }
+
     /**
      * Convert the string with hyphens to StudlyCaps,
      * e.g. post-authors => PostAuthors

README.md

@@ -47,6 +47,11 @@ You can also specify a namespace for the controller:
 $router->add('admin/{controller}/{action}', ['namespace' => 'Admin']);
 ```
 
+Another way - an automatic routing without using routing table:
+```php
+$router->dispatchRequest($_SERVER['REQUEST_URI']); die;
+```
+
 ## Controllers
 
 Controllers respond to user actions (clicking on a link, submitting a form etc.). Controllers are classes that extend the [Core\Controller](Core/Controller.php) class.

public/index.php

@@ -25,8 +25,11 @@
  */
 $router = new Core\Router();
 
+// Uncomment the next line for an automatic routing without using routing table
+//$router->dispatchRequest($_SERVER['REQUEST_URI']); die;
+
 // Add the routes
 $router->add('', ['controller' => 'Home', 'action' => 'index']);
 $router->add('{controller}/{action}');
 
-$router->dispatch($_SERVER['QUERY_STRING']);
+$router->dispatch($_SERVER['QUERY_STRING'] ?? '');