PHP开发笔记（3）Laravel

安装 PHP 开发环境

PHP开发笔记（1）开发环境

安装使用 Laravel

$ composer global require laravel/installer
$ export PATH=$PATH:~/.composer/vendor/bin
# 创建新的应用程序
$ laravel new blog
# 或者
$ composer create-project --prefer-dist laravel/laravel blog
$ cd blog
$ php artisan serve
# http://localhost:8000

示例

Laravel 7 CRUD Example | Laravel 7 Tutorial For Beginners

配置数据库

修改 .env 文件的数据库配置部分

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=laravel_blog
DB_USERNAME=root
DB_PASSWORD=

数据库迁移

创建数据库迁移命令文件

$ php artisan make:migration create_products_table --create=products
Created Migration: 2020_05_06_073654_create_products_table

修改所生成的 database/migrations/2020_05_06_073654_create_products_table.php 文件

<?php

use IlluminateDatabaseMigrationsMigration;
use IlluminateDatabaseSchemaBlueprint;
use IlluminateSupportFacadesSchema;

class CreateProductsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('products', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->text('detail');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('products');
    }
}

执行数据库迁移

$ php artisan migrate
Migration table created successfully.
Migrating: 2014_10_12_000000_create_users_table
Migrated:  2014_10_12_000000_create_users_table (0.03 seconds)
Migrating: 2019_08_19_000000_create_failed_jobs_table
Migrated:  2019_08_19_000000_create_failed_jobs_table (0.01 seconds)
Migrating: 2020_05_06_073654_create_products_table
Migrated:  2020_05_06_073654_create_products_table (0.01 seconds)

添加路由

修改 routes/web.php

Route::resource('products','ProductController');

添加控制器和模型

$ php artisan make:controller ProductController --resource --model=Product

模型类代码

app/Product.php

<?php
  
namespace App;
  
use IlluminateDatabaseEloquentModel;
   
class Product extends Model
{
    protected $fillable = [
        'name', 'detail'
    ];
}

控制器类代码

app/Http/Controllers/ProductController.php

<?php
  
namespace AppHttpControllers;
  
use AppProduct;
use IlluminateHttpRequest;
  
class ProductController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return IlluminateHttpResponse
     */
    public function index()
    {
        $products = Product::latest()->paginate(5);
  
        return view('products.index',compact('products'))
            ->with('i', (request()->input('page', 1) - 1) * 5);
    }
   
    /**
     * Show the form for creating a new resource.
     *
     * @return IlluminateHttpResponse
     */
    public function create()
    {
        return view('products.create');
    }
  
    /**
     * Store a newly created resource in storage.
     *
     * @param  IlluminateHttpRequest  $request
     * @return IlluminateHttpResponse
     */
    public function store(Request $request)
    {
        $request->validate([
            'name' => 'required',
            'detail' => 'required',
        ]);
  
        Product::create($request->all());
   
        return redirect()->route('products.index')
                        ->with('success','Product created successfully.');
    }
   
    /**
     * Display the specified resource.
     *
     * @param  AppProduct  $product
     * @return IlluminateHttpResponse
     */
    public function show(Product $product)
    {
        return view('products.show',compact('product'));
    }
   
    /**
     * Show the form for editing the specified resource.
     *
     * @param  AppProduct  $product
     * @return IlluminateHttpResponse
     */
    public function edit(Product $product)
    {
        return view('products.edit',compact('product'));
    }
  
    /**
     * Update the specified resource in storage.
     *
     * @param  IlluminateHttpRequest  $request
     * @param  AppProduct  $product
     * @return IlluminateHttpResponse
     */
    public function update(Request $request, Product $product)
    {
        $request->validate([
            'name' => 'required',
            'detail' => 'required',
        ]);
  
        $product->update($request->all());
  
        return redirect()->route('products.index')
                        ->with('success','Product updated successfully');
    }
  
    /**
     * Remove the specified resource from storage.
     *
     * @param  AppProduct  $product
     * @return IlluminateHttpResponse
     */
    public function destroy(Product $product)
    {
        $product->delete();
  
        return redirect()->route('products.index')
                        ->with('success','Product deleted successfully');
    }
}

视图代码

resources/views/products/layout.blade.php

<!DOCTYPE html>
<html>
<head>
    <title>Laravel 7 CRUD Application - ItSolutionStuff.com</title>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha/css/bootstrap.css" rel="stylesheet">
</head>
<body>
  
<div class="container">
    @yield('content')
</div>
   
</body>
</html>

resources/views/products/index.blade.php

@extends('products.layout')
 
@section('content')
    <div class="row">
        <div class="col-lg-12 margin-tb">
            <div class="pull-left">
                <h2>Laravel 7 CRUD Example from scratch - ItSolutionStuff.com</h2>
            </div>
            <div class="pull-right">
                <a class="btn btn-success" href="{{ route('products.create') }}"> Create New Product</a>
            </div>
        </div>
    </div>
   
    @if ($message = Session::get('success'))
        <div class="alert alert-success">
            <p>{{ $message }}</p>
        </div>
    @endif
   
    <table class="table table-bordered">
        <tr>
            <th>No</th>
            <th>Name</th>
            <th>Details</th>
            <th width="280px">Action</th>
        </tr>
        @foreach ($products as $product)
        <tr>
            <td>{{ ++$i }}</td>
            <td>{{ $product->name }}</td>
            <td>{{ $product->detail }}</td>
            <td>
                <form action="{{ route('products.destroy',$product->id) }}" method="POST">
   
                    <a class="btn btn-info" href="{{ route('products.show',$product->id) }}">Show</a>
    
                    <a class="btn btn-primary" href="{{ route('products.edit',$product->id) }}">Edit</a>
   
                    @csrf
                    @method('DELETE')
      
                    <button type="submit" class="btn btn-danger">Delete</button>
                </form>
            </td>
        </tr>
        @endforeach
    </table>
  
    {!! $products->links() !!}
      
@endsection

resources/views/products/create.blade.php

@extends('products.layout')
  
@section('content')
<div class="row">
    <div class="col-lg-12 margin-tb">
        <div class="pull-left">
            <h2>Add New Product</h2>
        </div>
        <div class="pull-right">
            <a class="btn btn-primary" href="{{ route('products.index') }}"> Back</a>
        </div>
    </div>
</div>
   
@if ($errors->any())
    <div class="alert alert-danger">
        <strong>Whoops!</strong> There were some problems with your input.<br><br>
        <ul>
            @foreach ($errors->all() as $error)
                <li>{{ $error }}</li>
            @endforeach
        </ul>
    </div>
@endif
   
<form action="{{ route('products.store') }}" method="POST">
    @csrf
  
     <div class="row">
        <div class="col-xs-12 col-sm-12 col-md-12">
            <div class="form-group">
                <strong>Name:</strong>
                <input type="text" name="name" class="form-control" placeholder="Name">
            </div>
        </div>
        <div class="col-xs-12 col-sm-12 col-md-12">
            <div class="form-group">
                <strong>Detail:</strong>
                <textarea class="form-control" style="height:150px" name="detail" placeholder="Detail"></textarea>
            </div>
        </div>
        <div class="col-xs-12 col-sm-12 col-md-12 text-center">
                <button type="submit" class="btn btn-primary">Submit</button>
        </div>
    </div>
   
</form>
@endsection

resources/views/products/edit.blade.php

@extends('products.layout')
   
@section('content')
    <div class="row">
        <div class="col-lg-12 margin-tb">
            <div class="pull-left">
                <h2>Edit Product</h2>
            </div>
            <div class="pull-right">
                <a class="btn btn-primary" href="{{ route('products.index') }}"> Back</a>
            </div>
        </div>
    </div>
   
    @if ($errors->any())
        <div class="alert alert-danger">
            <strong>Whoops!</strong> There were some problems with your input.<br><br>
            <ul>
                @foreach ($errors->all() as $error)
                    <li>{{ $error }}</li>
                @endforeach
            </ul>
        </div>
    @endif
  
    <form action="{{ route('products.update',$product->id) }}" method="POST">
        @csrf
        @method('PUT')
   
         <div class="row">
            <div class="col-xs-12 col-sm-12 col-md-12">
                <div class="form-group">
                    <strong>Name:</strong>
                    <input type="text" name="name" value="{{ $product->name }}" class="form-control" placeholder="Name">
                </div>
            </div>
            <div class="col-xs-12 col-sm-12 col-md-12">
                <div class="form-group">
                    <strong>Detail:</strong>
                    <textarea class="form-control" style="height:150px" name="detail" placeholder="Detail">{{ $product->detail }}</textarea>
                </div>
            </div>
            <div class="col-xs-12 col-sm-12 col-md-12 text-center">
              <button type="submit" class="btn btn-primary">Submit</button>
            </div>
        </div>
   
    </form>
@endsection

resources/views/products/show.blade.php

@extends('products.layout')
@section('content')
    <div class="row">
        <div class="col-lg-12 margin-tb">
            <div class="pull-left">
                <h2> Show Product</h2>
            </div>
            <div class="pull-right">
                <a class="btn btn-primary" href="{{ route('products.index') }}"> Back</a>
            </div>
        </div>
    </div>
   
    <div class="row">
        <div class="col-xs-12 col-sm-12 col-md-12">
            <div class="form-group">
                <strong>Name:</strong>
                {{ $product->name }}
            </div>
        </div>
        <div class="col-xs-12 col-sm-12 col-md-12">
            <div class="form-group">
                <strong>Details:</strong>
                {{ $product->detail }}
            </div>
        </div>
    </div>
@endsection

启动程序

http://localhost:8000/products