PHP中使用路由组件实现复杂的请求分发逻辑

<?php

// 引入FastRoute库
require_once 'vendor/autoload.php';

// 创建FastRoute路由实例
$router = FastRoutesimpleDispatcher(function(FastRouteRouteCollector $r) {
    $r->addRoute('GET', '/user/{id:d+}', 'UserController@show');
    $r->addRoute('POST', '/user', 'UserController@store');
    $r->addRoute('GET', '/post/{id:d+}', 'PostController@show');
});

// 解析当前请求的方法和URI
$httpMethod = $_SERVER['REQUEST_METHOD'];
$uri = $_SERVER['REQUEST_URI'];

// 去除查询字符串和URI的前导斜杠
$pos = strpos($uri, '?');
if ($pos !== false) {
    $uri = substr($uri, 0, $pos);
}
$uri = rawurldecode($uri);

// 调用FastRoute路由解析请求并返回相应的处理器
$routeInfo = $router->dispatch($httpMethod, $uri);

// 根据路由解析结果进行相应的处理
switch ($routeInfo[0]) {
    case FastRouteDispatcher::NOT_FOUND:
        // 处理404错误
        header('HTTP/1.1 404 Not Found');
        echo '404 Not Found';
        break;
    case FastRouteDispatcher::METHOD_NOT_ALLOWED:
        // 处理请求方法不允许错误
        header('HTTP/1.1 405 Method Not Allowed');
        echo '405 Method Not Allowed';
        break;
    case FastRouteDispatcher::FOUND:
        // 获取处理器的名称
        $handler = $routeInfo[1];

        // 获取处理器的参数
        $vars = $routeInfo[2];

        // 调用相应的处理器并传递参数
        call_user_func_array($handler, $vars);
        break;
}