Built-in PHP server router

router.php

<?php

/**
 * Built-in PHP server router:
 * 
 * - If file exists, serve file
 * - Access php files without .php extension
 * - Unknown routes throw 404
 * - Optionally fallback to index.php
 *
 * <Folder Studio>
 */

$uri = trim(urldecode(
  parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)
), '/');

// Emulate Apache's `mod_rewrite` functionality
if (file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $uri)) {
  return false;
}

// Allow .php files without extension
if (file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $uri . '.php')) {
  require $_SERVER['DOCUMENT_ROOT'] . '/' . $uri . '.php';
  return true;
}

// // Fallback to index
// require $_SERVER['DOCUMENT_ROOT'] . '/index.php';
// return true;

// Throw 404 on invalid route
http_response_code(404); ?>
<h1>Not Found</h1>
<p>The requested resource <code><?= $_SERVER['REQUEST_URI'] ?></code> was not found on this server.</p>

usage.md

php -S localhost:3001 -t public router.php