PHP 快速需求路由：FastRoute

FastRoute 提供了一個快速實現基于路由的規則表達。

示例代碼：

<?php
require '/path/to/FastRoute/src/bootstrap.php';
$dispatcher = FastRoute\simpleDispatcher(function(FastRoute\RouteCollector $r) {
    $r->addRoute('GET', '/user/{id:\d+}', 'handler1');
    $r->addRoute('GET', '/user/{id:\d+}/{name}', 'handler2');
    // Or alternatively
    $r->addRoute('GET', '/user/{id:\d+}[/{name}]', 'common_handler');
});
$routeInfo = $dispatcher->dispatch($httpMethod, $uri);
switch ($routeInfo[0]) {
    case FastRoute\Dispatcher::NOT_FOUND:
        // ... 404 Not Found
        break;
    case FastRoute\Dispatcher::METHOD_NOT_ALLOWED:
        $allowedMethods = $routeInfo[1];
        // ... 405 Method Not Allowed
        break;
    case FastRoute\Dispatcher::FOUND:
        $handler = $routeInfo[1];
        $vars = $routeInfo[2];
        // ... call $handler with $vars
        break;
}

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