laravel has several routes

Laravel has 6 types of routes: 1. get, the syntax "Route::get($uri,$callback)"; 2. post, the syntax "Route::post($uri,$callback)"; 3. put, the syntax "Route::put($uri, $callback)"; 4. patch, the syntax "Route::patch($uri, $callback)"; 5. delete, the syntax "Route::delete($ uri, $callback)"; 6. options, syntax "Route::options($uri, $callback)".

The operating environment of this tutorial: Windows 7 system, Laravel 6 version, DELL G3 computer.

What are the common routes in Laravel

Summary in one sentence:

6 types: post, get, put, patch, delete, options

Route::get($uri, $callback);
Route::post($uri, $callback);
Route::put($uri, $callback);
Route::patch($uri, $callback);
Route::delete($uri, $callback);
Route::options($uri, $callback);

1. What is the security measure of Lararel's CSRF protection form?

Function: Laravel provides a simple way to protect your application from Cross-site request forgery (CSRF) attacks. Cross-site request forgery is a malicious attack that leverages the identity of an authenticated user to run unauthorized commands.

Implementation: Add the following sentence to the form: {{csrf_field()}}. See the code

for details. The essence is: adding a token value to the form; input type="hidden" name="_token" value="SqlDhf...a string of random characters String "

The principle is: Check whether the token value of the form is legal, if it is legal, it will pass, otherwise it will not pass

<form method="POST" action="/profile">
    {{ csrf_field() }}
    ...
</form>

2. How to write the post request method in routing?

is the post method: Route::post('check',"LoginController@check");

3. How to implement the put request in routing?

Route writing method: Route's put method: Route::put('put','LoginController@put');

Controller writing method: This is the writing method of the basic controller

The request page sets the request type to put: input type="hidden" name="_method" value="put"

Writing in routing

// put请求

Route::get('putWeb','LoginController@putWeb');

// put的处理页面
Route::put('put','LoginController@put');

Controller writing

// put请求页面

public function putWeb(){

    return view('putWeb');
}

// put请求处理页面
public function put(Request $request){
    dd($request->input());
}

Request page writing

<form action="put" method="post">
    <p>
        {{csrf_field()}}

        <input type="hidden" name="_method" value="put">
        User:
        <input type="text" name="user" id="">
    </p>
</form>

4. How can one page in Laravel implement multiple request methods (I can get the page data, and the user can use the search box to post requests)?

match (specified request) ：Route::match(['get','post'],'/',"IndexController@index ");

Controller code:Determine whether the user is making a post request, if so, output the user's search, otherwise output the data normally displayed on the page

any (all requests) ：Route::any('/',"IndexController@index");

5, Laravel Usage examples and implementation of resource routing (more commonly used in actual projects)?

Example: There are many modules in the background, User module, management module, etc. (add, delete, modify, check): Write it directly in the routing A lot of trouble

Route::get('user/index','UserController@index');
Route::get('user/add','UserController@add');
Route::get('user/edit','UserController@edit');
Route::post('user/insert','UserController@insert');
Route::post('user/update','UserController@update');
Route::get('user/del','UserController@del');

Implementation: resource method: Route::resource('Admin','IndexController');

| GET|HEAD  | Admin              | Admin.index   | App\Http\Controllers\IndexController@index   | web          | #展示页面

| POST      | Admin              | Admin.store   | App\Http\Controllers\IndexController@store   | web          | #添加操作

| GET|HEAD  | Admin/create       | Admin.create  | App\Http\Controllers\IndexController@create  | web          | #添加页面

| DELETE    | Admin/{Admin}      | Admin.destroy | App\Http\Controllers\IndexController@destroy | web          | #删除操作

| PUT|PATCH | Admin/{Admin}      | Admin.update  | 
App\Http\Controllers\IndexController@update  | web          | #更新操作

| GET|HEAD  | Admin/{Admin}      | Admin.show    | App\Http\Controllers\IndexController@show    | web          |

| GET|HEAD  | Admin/{Admin}/edit | Admin.edit    | App\Http\Controllers\IndexController@edit    | web          | #修改页面

| GET|HEAD  | api/user           |               | Closure                                      | api,auth:api |

6. How to take parameters and multiple parameters in routing?

Parameters in braces: Route::get('user/del/{id}',function($ id){ echo $id##; });

Multiple parameters: Route::get('UserInfo/

{name}/{sex}',function($name,$sex){ echo $name; echo $ sex; });

Parameters that may or may not be included:

Question mark default value:Route::get('user/ edit/{id?}',function($id="default value"){ echo $id; }); : With a default value, it is guaranteed to have a value when there are no parameters.

7. How to access the parameters in the route in the controller?

Directly pass in the parameters, there is no value in $_GET

Route::get('UserInfo/{name}/{sex}',"IndexController@UserInfo");

// 新建UserInfo
public function UserInfo($a,$sex1){
  var_dump($a);
  var_dump($sex1);
}

8、命名路由是什么以及作用？

是什么：就是给路由命名

实现：Route::get('abc',"IndexController@abc")->name('one');

作用：获取别名的url地址：控制器中：route('one');可以到以one为别名的控制器中

作用：通过命名路由实现重定向（实现重定向的一种方式）：控制器中：return redirect()->route('one');

9、路由组命名空间的作用以及实现？

实现前后台控制器分离：需要在控制器目录下新建Admin目录和Home目录 在目录中新建控制器

在Route的group方法中指定命名空间：Route::group(['namespace'=>'Admin'],function(){

在Admin中的控制器要写好命名空间，并且继承控制器要use到控制器

//路由中代码
Route::group(['namespace'=>'Admin'],function(){
    Route::get('admin','IndexController@index');
    Route::get('admin/user','UserController@index');
    Route::get('admin/goods','GoodsController@index');
});

Route::group(['namespace'=>'Home'],function(){
    Route::get('/','IndexController@index');
});
#需要在控制器目录下新建Admin目录和Home目录 在目录中新建控制器
#注意 需要修改命名空间

控制器中代码
<?php

    namespace App\Http\Controllers\Admin;

    use Illuminate\Http\Request;

    use DB;

    use App\Http\Controllers\Controller;

    class UserController extends Controller
    {
        //index 方法

        public function index(){

            echo "我是后台控制器User";
        }

    }

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