The basics of Laravel learning-PHP Tutorial-php.cn

This article mainly introduces the basic knowledge about Laravel learning, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

1.MVC Introduction

The full name of MVC is Model View Controller, which is the abbreviation of Model-View-Controller
Model is the part of the application used to process application data logic
View is the part of the application that processes data display
Controller is the part of the application that handles user interaction

2.laravel core directory file

The basics of Laravel learning

app Contains the user's core code
booststrap contains framework startup and configuration loading files
config contains all configuration files
database contains database filling and migration files
public contains project entry and static resource files
resource contains views and original The resource file
stroage contains compiled template files as well as file-based session and file cache, log and framework files
tests unit tests File
wendor contains dependency files of compose

3. Routing

Multiple request routing

Route::match(['get', 'post']), 'match', funtion() { return 'match'; }); Route::any(['get', 'post']), funtion() { return 'any'; });

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Routing parameters

Route::get('user/{name}', funtion($name) { return $id; })->where('name', '[A-Za-z]+'); Route::get('user/{id}/{name?}', funtion($id, $name='phyxiao') { return $id. $name; })->where(['id' => '[0-9]+', 'name'=> '[A-Za-z]+']);

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Routing alias

Route::get('user/home', ['as' => 'home', funtion() { return route('home'); }]);

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Routing group

Route::group(['prefix' => 'user'], funtion() { Route::get('home', funtion() { return 'home'; }); Route::get('about', funtion() { return 'about'; }); });

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Routing output view

Route::get('index', funtion() { return view('welcome'); });

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4.Controller

Create control Device

php artisan make:controller UserController php artisan make:controller UserController --plain

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Route associated controller

Route::get('index', 'UserController@index');

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5. Model

php artisan make:model User

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6. Database

Three ways:DB facode Raw lookup,Query BuilderandEloquent ORM
Related filesconfig/database.php,.env

Query constructor

$bool = DB::table('user')->insert(['name => phyxiao', 'age' => 18]); $id = DB::table('user')->insertGetId(['name => phyxiao', 'age' => 18]); $bool = DB::table('user')->insert([ ['name => phyxiao', 'age' => 18], ['name => aoteman', 'age' => 19], ); var_dump($bool);

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$num= DB::table('user')->where('id', 12)->update(['age' => 30]); $num= DB::table('user')->increment('age', 3); $num= DB::table('user')->decrement('age', 3); $num= DB::table('user')->where('id', 12)->increment('age', 3); $num= DB::table('user')->where('id', 12)->increment('age', 3, ['name' =>'handsome']);

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$num= DB::table('user')->where('id', 12)->delete(); $num= DB::table('user')->where('id', '>=', 12)->delete(); DB::table('user')->truncate();

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$users= DB::table('user')->get(); $users= DB::table('user')->where('id', '>=', 12)->get(); $users= DB::table('user')->whereRaw('id >= ? and age > ?', [12, 18])->get(); dd(users); $user= DB::table('user')->orderBy('id', 'desc')->first(); $names = DB::table('user')->pluck('name'); $names = DB::table('user')->lists('name', 'id'); $users= DB::table('user')->select('id', 'age', 'name')->get(); $users= DB::table('user')->chunk(100, function($user){ dd($user); if($user->name == 'phyxiao') return false; });

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$num= DB::table('user')->count(); $max= DB::table('user')->max('age'); $min= DB::table('user')->min('age'); $avg= DB::table('user')->avg('age'); $sum= DB::table('user')->avg('sum');

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Eloquent ORM

// 建立模型 // app/user.php 
        
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// ORM操作 // app/Http/Contollers/userController.php public function orm() { //all $students = Student::all(); //find $student = Student::find(12); //findOrFail $student = Student::findOrFail(12); // 结合查询构造器 $students = Student::get(); $students = Student::where('id', '>=', '10')->orderBy('age', 'desc')->first(); $num = Student::count(); //使用模型新增数据 $students = new Student(); $students->name = 'phyxiao'; $students->age= 18; $bool = $student->save(); $student = Student::find(20); echo date('Y-m-d H:i:s', $student->created_at); //使用模型的Create方法新增数据 $students = Student::create( ['name' => 'phyxiao', 'age' => 18] ); //firstOrCreate() $student = Student::firstOrCreate( ['name' => 'phyxiao'] ); //firstOrNew() $student = Student::firstOrNew( ['name' => 'phyxiao'] ); $bool= $student->save(); //使用模型更新数据 $student = Student::find(20); $student->name = 'phyxiao'; $student->age= 18; $bool = $student->save(); $num = Student::where('id', '>', 20)->update(['age' => 40]); //使用模型删除数据 $student = Student::find(20); $bool = $student->delete(); //使用主见删除数据 $num= Student::destroy(20); $num= Student::destroy([20, 21]); $num= Student::where('id', '>', 20)->delete; }

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7.Blade template engine

 @yield('content', '内容')  @section(‘header’) 头部 @show

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@extends('layouts') @section(‘header’) @parent header @stop @section(‘content’) content  {{$name}}
  {{ time() }}
 {{ date('Y-m-d H:i:s', time()) }}
 {{ in_array($name, $arr) ? 'true': 'false' }}
 {{ $name or 'default' }}
  @{{$name}}
 {{--模板注释--}} {{--引入子视图--}} @include('common', ['msg' => 'erro']) {{--流控制--}} @if ($name == 'phyxiao') I'm phyxiao @elseif($name == 'handsome') I'm handsome @else none @endif @unless($name == 'phyxiao') ture @endunless @for($i=0; $i < 10; $i++) {{$i}} @endfor @foreach($students as $student) {{$student->name}} @endfor @forelse($students as $student) {{$student->name}} @empty null @endforelse text text text @stop

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