Shulou(Shulou.com)05/31 Report--

This article mainly introduces the relevant knowledge of "what are the basic knowledge of Laravel". The editor shows you the operation process through an actual case, and the operation method is simple, fast and practical. I hope this article "what are the basics of Laravel" can help you solve the problem.

First, install laravle1, install composer2, and execute commands:

Composer create-project laravel/laravel project folder name-- prefer-dist

II. Introduction to the catalogue

App: the core code of the application

Bootstrap: a boot framework app.php file, a cache directory (including routing and cache files), framework startup files, generally unchanged.

Config: all profiles

Database: where the migrations directory can generate data tables.

Public: entry file storage location, and static resources (similar to tp)

Resources:

Routes: all applied route definitions

Tests: can be used for unit testing

Vendor: all composer dependent packages

Third, routing first knowledge 1. Several common requests

Route::get (url, url, url,callback)

Route::post (url, url, url,callback)

Route::put (url, url, url,callback)

Route::delete (url, url, url,callback)

2. Match the specified request method Route::match (['get','post'],' /', function () {}); 3. Configure any request method Route::any ('/ home', function () {}); 4. Add the required parameter Route::get ('/ home/ {id}', function ($id) {echo'id is:'. $id;}) to the route 5. Add optional parameters Route::get ('/ home/ {id?}', function ($id =') {echo'id is:'. $id;}) to the route. 6. Pass the get parameter Route::get ('/ home', function () {echo'id is:'. $_ GET ['id'];}); 7. Add alias Route::any to the route (' / home/index', function () {echo 'test';})-> name ('hh'); 8. Set the route group

For example, there are the following routes:

/ admin/login

/ admin/index

/ admin/logout

/ admin/add

If it is troublesome to add one by one, they all have a common difference: they all have a / admin/ prefix. You can set up a routing group to add:

Route::group (['prefix'= >' admin'], function () {Route::get ('test1', function () {echo' test1';}); Route::get ('test2', function () {echo' test2';});})

At this point you can access it via / admin/test1.

9. Routing configuration controller

The controller can build a foreground and a background:

Create a route on the command line:

Php artisan make:controller Admin/IndexController

Basic route establishment:

Route::get ('test/index','TestController@index')

Subdirectory routing establishment:

Route::get ('/ admin/index/index','Admin\ IndexController@index'); IV. Laravel verifier

Introduce: use Illuminate\ Support\ Facades\ Validator

$param = $request- > all (); $rule = ['name'= >' required | max:2',]; $message = ['required' = >': attribute cannot be empty', 'max' = >': the maximum length of attribute is 2']; $replace = ['name'= >' name',]; $validator = Validator::make ($param, $rule, $message,$replace) If ($validator- > fails ()) {return response ()-> json (['status'= > 0 validator- > errors ()-> first ()]). Fifth, the controller acquires the value entered by the user

If you want to use a class in the controller, such as use Illuminate\ Http\ Request, it can be abbreviated to use Request.

However, you need to add the following to the app.php configuration file under the config directory:

'aliases' = > [' App' = > Illuminate\ Support\ Facades\ App::class, 'Arr' = > Illuminate\ Support\ Arr::class,' Artisan' = > Illuminate\ Support\ Facades\ Artisan::class, 'Auth' = > Illuminate\ Support\ Facades\ Auth::class,' Blade' = > Illuminate\ Support\ Facades\ Blade::class, 'Request' = > Illuminate\ Support\ Facades\ Request::class,] 1. Get the single input value of the user: Input::get ('id') 2. Get all the values entered by the user: Input::all ()

What is printed is an array.

About dd (dump+die)

3. Get the specified value entered by the user: Input::only (['id','name'] / / only receive id, and the rest do not accept 4. Get the value other than the specified value entered by the user: Input::except ([' name'] / / do not receive name) The rest receive 5, determine whether a value exists Input::has ('name') / / there is a return true there is no return false where 0 returns true 6, the creation and use of the view 1, the creation of the view

Views can also be managed by catalog:

Controller syntax:

Return view ('home/test')

It can also be written as:

Return view ('home.test'); 2. Variable mapping

In the controller:

Return view ('home/test', [' day'= > time ()])

In the view:

{{$day}}

There are three kinds of variable mappings in the controller:

View (template file, array)

View (template file)-> with (array)

View (template file)-> with (array)-> with (array)

Learn about the compact array.

3. View rendering 3.1Using foreach

In the controller:

Public function index () {$arr = [0 = > ['name' = >' tom', 'age' = >' 12',], 1 = > ['name' = >' bby', 'age' = >' 13',]] Return view ('home/test', [' data'= > $arr]);}

In the view:

@ foreach ($data as $k = > $v) key: {{$k}} value: {{$v ['name']}} @ endforeach3.2 if @ if (1' welcome' 2) Yes @ else is not @ endif4, references between views @ include ('welcome') 7, creation and use of models 1, commands for creating models

At this point, it will be created in the app directory:

2. Basic settings of the model

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