Create Core/Router and public/index then test the Router

Core/Router.php

@@ -0,0 +1,95 @@
+<?php
+namespace Core;
+
+class Router
+{
+    private
+        $routes = [],
+        $params = [];
+
+    public function getRoutes()
+    {
+        return $this->routes;
+    }
+
+    public function getParams()
+    {
+        return $this->params;
+    }
+
+    public function add($route, $params = [])
+    {
+        $route = preg_replace('/\//', '\/', $route);
+        $route = preg_replace('/\{([a-z]+)\}/', '(?P<\1>[a-z-]+)', $route);
+        $route = preg_replace('/\{([a-z]+):([^\}]+)\}/', '(?P<\1>\2)', $route);
+        $route = '/^'.$route.'$/';
+
+        if ($this->routes[$route] = $params) {
+            return true;
+        }
+        return false;
+    }
+
+    public function match($url)
+    {
+        $url = htmlspecialchars($url);
+
+        foreach ($this->routes as $route => $params) {
+            if (preg_match($route, $url, $matches)) {
+                foreach ($matches as $key => $match) {
+                    if (is_string($key)) {
+                        $params[$key] = $match;
+                    }
+                }
+                if ($putParams = $this->params = $params) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    public function dispatch($url)
+    {
+        $url = $this->removeQueryStringVariable($url);
+        if ($this->match($url)) {
+            $controller = $this->params['controller'];
+            $controller = $this->convertToStudlyCaps($controller);
+            $controller = $this->getNamespace($controller);
+
+            if (class_exists($controller)) {
+                $object = new $controller();
+
+                $action = $this->params['action'];
+                $action = $this->convertToCamelCaps($action);
+
+                if (is_callable([$object, $action])) {
+                    $object->$action();
+                }
+            }
+        }
+        return false;
+    }
+
+    private function removeQueryStringVariable($url)
+    {
+        $parts = explode('&', $url);
+        return $url = $parts[0];
+    }
+
+    private function convertToStudlyCaps($string)
+    {
+        return str_replace(' ', '', ucwords(str_replace('-', ' ', $string)));
+    }
+
+    private function getNamespace($controller)
+    {
+        return $namespace = 'App\Controllers\\' . $controller;
+    }
+
+    private function convertToCamelCaps($string)
+    {
+        return lcfirst($this->convertToStudlyCaps($string));
+    }
+}

_tests/unit/RouterTest.php

@@ -0,0 +1,69 @@
+<?php
+namespace Core;
+
+class RouterTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * Data provider for matchingRouteSuccess
+     *
+     * @return array
+     */
+    public function routeProvider()
+    {
+        return [
+            [
+                '',
+                ['controller' => 'Data', 'action' => 'index'],
+                '',
+                ['controller' => 'Data', 'action' => 'index']
+            ],
+            [
+                '{controller}/{action}',
+                [],
+                'home/index',
+                ['controller' => 'home', 'action' => 'index']
+            ],
+            [
+                '{controller}/{id:\d+}/{action}',
+                [],
+                'home/150/index',
+                ['controller' => 'home', 'action' => 'index', 'id' => '150']
+            ]
+        ];
+    }
+
+    /**
+     *
+     * @test
+     * @dataProvider routeProvider
+     */
+    public function matchingRouteSuccess($route, $params, $url, $expected_param)
+    {
+        $router = new Router();
+
+        $router->add($route, $params);
+
+        $this->assertTrue($router->match($url));
+
+        $this->assertEquals($expected_param, $router->getParams());
+    }
+
+    /**
+     *
+     * @test
+     * @dataProvider routeProvider
+     */
+    public function dispatchingRouteSuccess($route, $params, $url)
+    {
+        // $url = 'home/index';
+
+        $router = new Router();
+
+        // $router->add('{controller}/{action}');
+        $router->add($route, $params);
+
+        $this->assertTrue($router->match($url));
+
+        $this->assertFalse($router->dispatch($url));
+    }
+}

public/index.php

@@ -0,0 +1,9 @@
+<?php
+$router = new Router();
+
+$router->add('', ['controller' => 'Data', 'action' => 'index']);
+$router->add('{controller}/{action}');
+$router->add('{controller}/{id:\d+}/{action}');
+
+$url = $_SERVER['QUERY_STRING'];
+$router->dispatch($url);