How to build a micro-mall system with PHP? First, select the appropriate framework (such as Laravel or ThinkPHP), then build an environment (PHP, MySQL, Web server, Composer), create a project and configure a database, run the migration to generate a data table, use Laravel's own Auth components to achieve user authentication, design the database table structure (users, products, categories, orders, order_items), create a model and write a migration file, develop an API interface and configure routes, use Laravel Sanctum to implement API authentication, configure CORS to support cross-domain requests of applets, and finally perform API testing and develop a front-end call interface for applets.

The core of building a micro-mall system with PHP is to build a stable and extensible back-end service and provide API interface for mini-program front-end calls. This involves multiple links such as database design, user authentication, product management, and order processing. Choosing a suitable PHP framework (such as Laravel, ThinkPHP) can greatly simplify the development process.

Solution

1. Environment construction:

   
   • Make sure the server has PHP (recommended version 7.2 or above), MySQL database, and web server (such as Apache or Nginx).
   • Install Composer to manage PHP dependencies.

2. Select the PHP framework:

   • Laravel: Powerful, active community, suitable for large projects.
   • ThinkPHP: It is widely used in China, fast to get started, and is suitable for rapid development.
   • Here we take Laravel as an example.

3. Create a Laravel project:

   

    composer create-project --prefer-dist laravel/laravel microshop
   cd microshop

4. Configure the database:

   • Configure database connection information in the .env file.

      DB_CONNECTION=mysql
     DB_HOST=127.0.0.1
     DB_PORT=3306
     DB_DATABASE=microshop
     DB_USERNAME=your_username
     DB_PASSWORD=your_password

   • Run database migration:

      php artisan migrate

5. User Authentication:

   • Use the Auth component that comes with Laravel:

      php artisan make:auth

   • This will automatically generate user registration, login and other related pages and controllers.

6. Database design:

   • Key tables include:
     • users : User information (laravel comes with it).
     • products : product information (ID, name, description, price, inventory, pictures, etc.).
     • categories : Product category (ID, name, parent ID, etc.).
     • orders : order information (ID, user ID, order number, total price, status, creation time, etc.).
     • order_items : line items (ID, order ID, product ID, quantity, unit price, etc.).

7. Create models and migrations:

    php artisan make:model Product -m
   php artisan make:model Category -m
   php artisan make:model Order -m
   php artisan make:model OrderItem -m

   • Edit the generated migration file and define the table structure. For example, the migration file of products table:

     <?php

   use Illuminate\Database\Migrations\Migration; use Illuminate\Database\Schema\Blueprint; use Illuminate\Support\Facades\Schema;

   class CreateProductsTable extends Migration { public function up() { Schema::create('products', function (Blueprint $table) { $table->id(); $table->string('name'); $table->text('description')->nullable(); $table->decimal('price', 10, 2); $table->integer('stock')->default(0); $table->string('image')->nullable(); $table->timestamps(); }); }

    public function down()
   {
       Schema::dropIfExists('products');
   }

   }

    - Run the migration:
   ```bash
   php artisan migrate

8. API interface development:

   • Create an API controller to handle applet requests.

      php artisan make:controller Api/ProductController
     php artisan make:controller Api/CategoryController
     php artisan make:controller Api/OrderController
     php artisan make:controller Api/UserController

   • Define API routes in routes/api.php file. For example, get the product list:

     <?php

   use Illuminate\Http\Request; use Illuminate\Support\Facades\Route; use App\Http\Controllers\Api\ProductController; use App\Http\Controllers\Api\CategoryController; use App\Http\Controllers\Api\OrderController; use App\Http\Controllers\Api\UserController;

   Route::middleware('auth:sanctum')->get('/user', function (Request $request) { return $request->user(); });

   Route::get('/products', [ProductController::class, 'index']); Route::get('/products/{id}', [ProductController::class, 'show']); Route::get('/categories', [CategoryController::class, 'index']); Route::post('/orders', [OrderController::class, 'store'])->middleware('auth:sanctum'); // Certification requires Route::post('/register', [UserController::class, 'register']); Route::post('/login', [UserController::class, 'login']);

    - Implement API logic in the controller. For example, `ProductController.php`:
   ```php
   <?php
   
   namespace App\Http\Controllers\Api;
   
   use App\Http\Controllers\Controller;
   use App\Models\Product;
   use Illuminate\Http\Request;
   
   class ProductController extends Controller
   {
       public function index()
       {
           $products = Product::all();
           return response()->json($products);
       }
   
       public function show($id)
       {
           $product = Product::findOrFail($id);
           return response()->json($product);
       }
   }

9. User Authentication (API):

   • Use Laravel Sanctum for API authentication.

      composer requires laravel/sanctum
     php artisan vendor:publish --tag=sanctum:config
     php artisan migrate

   • Add HasApiTokens trait in the User model.

     <?php

   namespace App\Models;

   use Illuminate\Contracts\Auth\MustVerifyEmail; use Illuminate\Database\Eloquent\Factories\HasFactory; use Illuminate\Foundation\Auth\User as Authenticatable; use Illuminate\Notifications\Notifiable; use Laravel\Sanctum\HasApiTokens;

   class User extends Authenticatable { use HasApiTokens, HasFactory, Notifiable;

    // ...

   }

    - Implement the registration and login interface (such as `UserController.php`):
   ```php
   public function register(Request $request)
   {
       $request->validate([
           'name' => 'required|string',
           'email' => 'required|string|email|unique:users',
           'password' => 'required|string|min:6',
       ]);
   
       $user = User::create([
           'name' => $request->name,
           'email' => $request->email,
           'password' => Hash::make($request->password),
       ]);
   
       $token = $user->createToken('auth_token')->plainTextToken;
   
       return response()->json([
           'access_token' => $token,
           'token_type' => 'Bearer',
       ]);
   }
   
   public function login(Request $request)
   {
       if (!Auth::attempt($request->only('email', 'password'))) {
           return response()->json([
               'message' => 'Invalid login credentials'
           ], 401);
       }
   
       $user = User::where('email', $request['email'])->firstOrFail();
   
       $token = $user->createToken('auth_token')->plainTextToken;
   
       return response()->json([
           'access_token' => $token,
           'token_type' => 'Bearer',
       ]);
   }

10. CORS configuration:

    • In order to allow applets to request across domains, CORS is required. It can be configured in the .env file:

       SANCTUM_STATEFUL_DOMAINS=your_miniprogram_domain

    • Or use fruitcake/laravel-cors package.

    • Test API:

      • Use Postman or similar tools to test the API interface.

    • Mini Program Front-end Development:

      • Use WeChat developer tools, call API interfaces, display products, process orders, etc.

How to choose the right PHP framework to build a micro-mall?

The key to choosing a PHP framework is the size, complexity, team experience and performance requirements of the project. Laravel is suitable for large, complex projects with powerful features and an active community, but has a steep learning curve. ThinkPHP is widely used in China and is fast to get started. It is suitable for rapid development of small and medium-sized projects, but it has relatively weak scalability. CodeIgniter is a lightweight framework that is simple and easy to use, suitable for small projects or scenarios with high performance requirements. The Yii framework performs well in enterprise-level applications, providing rich features and good performance. According to the specific needs of the project, carefully evaluate the advantages and disadvantages of each framework and choose the most suitable framework.

How to optimize performance in PHP micro-mall system?

Performance optimization is an ongoing process involving multiple aspects. First, we must optimize database queries, avoid full table scanning, use indexes, and design the database structure reasonably. Secondly, caching technologies, such as Redis or Memcached, can be used to cache commonly used data and reduce database access. In addition, PHP code can be optimized to avoid unnecessary calculations and use efficient algorithms. For static resources such as pictures, CDN acceleration can be used. Gzip compression can also be turned on to reduce network transmission. Finally, you can use performance analysis tools such as Xdebug or Blackfire to find out performance bottlenecks and perform targeted optimization.

How to ensure the security of PHP micro-mall system?

Security is an important part of the micro-mall system. First, to prevent SQL injection attacks, use parameterized queries or ORM frameworks. Secondly, we must prevent XSS attacks and strictly filter and escape user input. In addition, to prevent CSRF attacks, use CSRF tokens. For user passwords, secure hashing algorithms should be used for encrypted storage. At the same time, we must regularly update the PHP version and dependency libraries to fix known security vulnerabilities. Web Application Firewall (WAF) can also be used to enhance security. Be sure to scan all files uploaded by users to prevent malicious files from being uploaded.

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