Add project files

inc/Router.php

@@ -0,0 +1,37 @@
+<?php
+class Router {
+  private static array $routes = [];
+
+  public static function add(string $method, string $pattern, callable $handler): void {
+    self::$routes[] = [
+      'method' => strtoupper($method),
+      'pattern' => self::normalizePattern($pattern),
+      'handler' => $handler,
+    ];
+  }
+  public static function get(string $pattern, callable $handler): void { self::add('GET', $pattern, $handler); }
+  public static function post(string $pattern, callable $handler): void { self::add('POST', $pattern, $handler); }
+  public static function delete(string $pattern, callable $handler): void { self::add('DELETE', $pattern, $handler); }
+
+  private static function normalizePattern(string $pattern): string {
+    $pattern = '/' . trim($pattern, '/');
+    $pattern = preg_replace('#\{([a-zA-Z_][a-zA-Z0-9_]*)\}#', '(?P<$1>[^/]+)', $pattern);
+    return '#^' . $pattern . '$#';
+  }
+
+  public static function dispatch(string $method, string $uri): void {
+    $path = parse_url($uri, PHP_URL_PATH) ?: '/';
+    $path = '/' . trim($path, '/');
+    foreach (self::$routes as $route) {
+      if ($route['method'] !== strtoupper($method)) continue;
+      if (preg_match($route['pattern'], $path, $matches)) {
+        $params = [];
+        foreach ($matches as $k => $v) { if (!is_int($k)) $params[$k] = $v; }
+        call_user_func($route['handler'], $params);
+        return;
+      }
+    }
+    http_response_code(404);
+    echo '404 Not Found';
+  }
+}