How to use yii framework

Free and open source PHP Web Framework Yii Getting Started Guide Installation Prerequisites: PHP 7.2, Composer Create Application: composer create-project yiisoft/yii2-app-basic your-app-name Project Structure: Contains assets, config, controllers, models, runtime, views, web, etc. Create Controller: Create a class in the controllers directory, such as SiteController, define operation methods and create a model: In models

Yii Framework Guide

Introduction

Yii is a free, open source PHP web framework for building high-performance, scalable, and secure web applications. It is lightweight, fast and easy to use.

getting Started

To get started with Yii, you need:

• Install PHP 7.2 or later.
• Install Composer.
• Create a new Yii application: composer create-project --prefer-dist yiisoft/yii2-app-basic your-app-name .

Project structure

A basic Yii application contains the following directories:

• assets : Static files (such as CSS, JavaScript, images).
• config : Application configuration.
• controllers : A class that controls application behavior.
• models : Classes representing database tables.
• runtime : The directory where temporary files are stored.
• views : Contains the PHP template file for the front end of the application.
• web : a public web directory.

Create a controller

The controller is the class that handles user requests. To create a controller, create a new file in the controllers directory, such as SiteController.php :

 <code class="php">namespace app\controllers; use yii\web\Controller; class SiteController extends Controller { public function actionIndex() { // 这是你的主页面操作} }</code>

Create a model

A model is a class representing a database table. To create a model, create a new file in the models directory, such as User.php :

 <code class="php">namespace app\models; use yii\db\ActiveRecord; class User extends ActiveRecord { public $username; public $email; public $password; }</code>

Define the route

The route maps the URL to the controller action. Add the following code to the config/web.php file:

 <code class="php">return [ 'components' => [ 'urlManager' => [ 'rules' => [ '/' => 'site/index', ], ], ], ];</code>

Using templates

Template is used to generate the front end of the application. Add the following code in views/site/index.php :

 <code class="php"><h1 id="欢迎来到Yii-应用程序">欢迎来到Yii 应用程序！</h1></code>

Run the application

To run the application, enter the following command in the terminal:

 <code>php yii serve</code>

The application will run on http://localhost:8080.

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