组中有或无参数的Laravel路由

// routes/web.php

// 基本的无参数路由
Route::get('/', function () {
    return 'Hello World';
});

// 带有名称的无参数路由
Route::get('/about', function () {
    return view('about');
})->name('about');

// routes/web.php

// 必需参数路由
Route::get('/user/{id}', function ($id) {
    return 'User ' . $id;
});

// 可选参数路由
Route::get('/user/{name?}', function ($name = null) {
    return $name ? 'Hello ' . $name : 'Hello Guest';
});

// 使用正则表达式约束参数
Route::get('/post/{slug}', function ($slug) {
    return 'Post with slug: ' . $slug;
})->where('slug', '[A-Za-z0-9-_]+');

// routes/web.php
Route::get('/user/{id}', 'UserController@show');

// app/Http/Controllers/UserController.php
public function show($id)
{
    return 'User ' . $id;
}

// routes/web.php
Route::get('/posts/{post}', 'PostController@show');
Route::get('/posts/create', 'PostController@create');