通常，通过使用以下规则将所有请求路由到单个入口点（根据该请求执行不同代码的文件）来完成：
# Redirect everything that doesn't match a directory or file to index.phpRewriteCond %{REQUEST_FILENAME} !-dRewriteCond %{REQUEST_FILENAME} !-fRewriteRule .* index.php [L]然后，该文件将请求（
$_SERVER["REQUEST_URI"]）与路由列表进行比较-
匹配请求的模式到控制器动作（在MVC应用程序中）或其他执行路径的映射。框架通常包含一条路由，该路由可以从请求本身推断出控制器和操作，作为备用路由。
一个小的简化示例：
<?php// Define a couple of simple actionsclass Home { public function GET() { return 'Homepage'; }}class about { public function GET() { return 'about page'; }}// Mapping of request pattern (URL) to action classes (above)$routes = array( '/' => 'Home', '/about' => 'about');// Match the request to a route (find the first matching URL in routes)$request = '/' . trim($_SERVER['REQUEST_URI'], '/');$route = null;foreach ($routes as $pattern => $class) { if ($pattern == $request) { $route = $class; break; }}// If no route matched, or class for route not found (404)if (is_null($route) || !class_exists($route)) { header('HTTP/1.1 404 Not Found'); echo 'Page not found'; exit(1);}// If method not found in action class, send a 405 (e.g. Home::POST())if (!method_exists($route, $_SERVER["REQUEST_METHOD"])) { header('HTTP/1.1 405 Method not allowed'); echo 'Method not allowed'; exit(1);}// Otherwise, return the result of the action$action = new $route;$result = call_user_func(array($action, $_SERVER["REQUEST_METHOD"]));echo $result;与第一个配置结合使用，这是一个简单的脚本，可让您使用像这样的URL
domain.com/about。希望这可以帮助您了解这里发生的事情。
