With the popularity of online media, the demand for news websites is also growing. If you plan to create a news website, consider using the Yii framework to build your website. Yii is a popular PHP framework designed to make web application development simpler and more efficient.

Yii framework has many advantages, including:

1. Efficient performance

Yii framework is a fast framework that is able to handle large amounts of Concurrent requests. This is because the Yii framework adopts some of the latest PHP technologies and uses a variety of caching mechanisms to improve website performance. This feature is very important for news websites as it needs to be able to handle high traffic situations.

2. Flexible and easy to extend

The Yii framework is very flexible and can be easily extended and customized. If you need to add new functionality or modify existing functionality, the Yii framework provides very clear extension interfaces and class libraries. This means you can easily write new modules or plugins and integrate them into your website.

3. High security

The Yii framework takes security as its design principle and provides a series of security protection mechanisms. These mechanisms include input filtering, data encryption, authentication, and authorization functions. These mechanisms are necessary to ensure that your news website is not vulnerable to hackers or other security threats.

Now, let’s take a look at how to create a news website using the Yii framework.

The first step is to install the Yii framework

Before you start, you need to install the Yii framework. There are two ways to install the Yii framework: through Composer or manual download. Here, I choose the Composer installation method. If you don't have Composer installed yet, please install Composer first and add it to your system path.

In the terminal, go to your project directory and run the following command to install the Yii framework:

composer require yiisoft/yii2-app-basic

This command will install the Yii Basic application template and Yii core library. After the installation is complete, you can execute the following command to run the Yii application:

./yii serve

This command will start a local web server and run your Yii application. You can open http://localhost:8080 in your browser to view your website homepage.

Second step, design your news website database

Before creating any web application, you need to design your database. Assume that our news website requires the following database table:

• news: stores the title, content, date, author and other information of the news
• category: stores the classification information of the news
• user: Store user information for news websites

In the Yii framework, you can use the Migrations tool to create, update and manage your database. You can use the following command to create a new Migration:

./yii migrate/create create_news_table

This command will create a Migration class named create_news_table, which will be used to create the news table and other related tables (for example, category and user tables).

In the create_news_table class, you need to use the database API of the Yii framework to create your database table. For example, here is the sample code to create a news table:

<?php

use yiidbMigration;

class m210816_100000_create_news_table extends Migration
{
    public function safeUp()
    {
        $this->createTable('news', [
            'id' => $this->primaryKey(),
            'title' => $this->string()->notNull(),
            'content' => $this->text(),
            'category_id' => $this->integer(),
            'user_id' => $this->integer(),
            'created_at' => $this->timestamp()->defaultExpression('CURRENT_TIMESTAMP'),
        ]);

        $this->addForeignKey('fk_news_category', 'news', 'category_id', 'category', 'id', 'CASCADE', 'CASCADE');
        $this->addForeignKey('fk_news_user', 'news', 'user_id', 'user', 'id', 'CASCADE', 'CASCADE');
    }

    public function safeDown()
    {
        $this->dropForeignKey('fk_news_category', 'news');
        $this->dropForeignKey('fk_news_user', 'news');

        $this->dropTable('news');
    }
}

In this code, we use the createTable method of the Yii framework to create newsTable, then use the addForeignKey method to define foreign key constraints to ensure data consistency.

With the Migration class, you can use the following command to run Migration to create a new database table:

./yii migrate/up

This command will create a new database table and other related tables.

The third step is to create the Yii model

In the Yii framework, the model is the core part used to represent business logic and data, and is also part of the MVC architecture pattern. In the Yii framework, models are the simplest and most powerful way to process data.

To create a model, you can use the following command:

./yii generate/model News --tableName=news

This command will create a model named News and associate it to newssheet. Next, you need to customize your model using the following code:

<?php

namespace appmodels;

use Yii;

class News extends yiidbActiveRecord
{
    public static function tableName()
    {
        return 'news';
    }

    public function rules()
    {
        return [
            [['title'], 'required'],
            [['content'], 'string'],
            [['category_id', 'user_id'], 'integer'],
            [['created_at'], 'safe'],
            [['title'], 'string', 'max' => 255],
        ];
    }

    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'title' => 'Title',
            'content' => 'Content',
            'category_id' => 'Category ID',
            'user_id' => 'User ID',
            'created_at' => 'Created At',
        ];
    }
}

In this code, we define the table name and validation rules for the News model, and also define the Label (text used to display to the user). You can access and modify data tables through this model, for example:

$news = new News();
$news->title = 'Hello, World!';
$news->content = 'Welcome to my news website.';
$news->category_id = 1;
$news->user_id = 1;
$news->save();

This will add a news item to the news table.

The fourth step is to create Yii controllers and views

In the Yii framework, the controller is the part used to process user requests and render responses. The controller routes user requests to the correct action and uses a specific view file to render the response.

To create a controller, you can use the following command:

./yii generate/controller News

This will create a controller named NewsController. Next, you need to add some operations to the controller, for example:

<?php

namespace appcontrollers;

use Yii;
use appmodelsNews;
use yiiwebController;

class NewsController extends Controller
{
    public function actionIndex()
    {
        $news = News::find()->all();
        return $this->render('index', [
            'news' => $news,
        ]);
    }

    public function actionView($id)
    {
        $news = News::findOne($id);
        return $this->render('view', [
            'news' => $news,
        ]);
    }

    public function actionCreate()
    {
        $news = new News();
        if ($news->load(Yii::$app->request->post()) && $news->save()) {
            return $this->redirect(['view', 'id' => $news->id]);
        }
        return $this->render('create', [
            'news' => $news,
        ]);
    }

    public function actionUpdate($id)
    {
        $news = News::findOne($id);
        if ($news->load(Yii::$app->request->post()) && $news->save()) {
            return $this->redirect(['view', 'id' => $news->id]);
        }
        return $this->render('update', [
            'news' => $news,
        ]);
    }

    public function actionDelete($id)
    {
        $news = News::findOne($id);
        $news->delete();
        return $this->redirect(['index']);
    }
}

In this code, we define five operations: Index, View, Create, Update and Delete. This presents the view file to the user and returns a response based on the user's request.

In order to create view files for these operations, for example:

• app/views/news/index.php
• app/views/news/view.php
• app/views/news/create.php
• app/views/news/update.php

你需要添加如下代碼：

<?php foreach ($news as $item): ?>
    <div>
        <h2><?= $item->title ?></h2>
        <p><?= $item->content ?></p>
        <p><?= $item->created_at ?></p>
        <p>Author: <?= $item->user_id ?></p>
        <p>Category: <?= $item->category_id ?></p>
        <a href="<?= Yii::$app->urlManager->createUrl(['news/view', 'id' => $item->id]) ?>">View</a>
        <a href="<?= Yii::$app->urlManager->createUrl(['news/update', 'id' => $item->id]) ?>">Update</a>
        <a href="<?= Yii::$app->urlManager->createUrl(['news/delete', 'id' => $item->id]) ?>">Delete</a>
    </div>
<?php endforeach; ?>

在這個代碼中，我們用循環(huán)遍歷新聞，然后為每個新聞輸出標(biāo)題、內(nèi)容、日期、作者和分類，以及三個按鈕View、Update和Delete。

第五步，定義Yii路由和URL規(guī)則

在Yii框架中，路由和URL規(guī)則告訴Yii框架如何將用戶請求路由到正確的控制器和操作。

默認(rèn)情況下，Yii框架使用/controller/action格式的URL，例如/news/index。但是你可以自定義路由和URL規(guī)則，例如將/news路由到NewsController的Index操作。

要定義路由和URL規(guī)則，你可以使用如下代碼：

'urlManager' => [
    'enablePrettyUrl' => true,
    'enableStrictParsing' => true,
    'showScriptName' => false,
    'rules' => [
        // NewsController
        ['class' => 'yiiestUrlRule', 'controller' => 'news'],
        'news' => 'news/index',
        'news/create' => 'news/create',
        'news/<id:d+>' => 'news/view',
        'news/<id:d+>/update' => 'news/update',
        'news/<id:d+>/delete' => 'news/delete',
    ],
],

在這個代碼中，我們使用規(guī)則數(shù)組來自定義路由和URL規(guī)則。例如，我們將news路由到NewsController的Index操作，而將news/create路由到NewsController的Create操作。

第六步，測試Yii應(yīng)用程序

現(xiàn)在，你已經(jīng)創(chuàng)建了一個新聞網(wǎng)站，并使用Yii框架構(gòu)建了它。要測試你的新聞網(wǎng)站，你可以在終端中運(yùn)行如下命令啟動本地Web服務(wù)器：

./yii serve

然后在瀏覽器中打開http://localhost:8080，查看你的新聞網(wǎng)站。

最后，當(dāng)你為你的新聞網(wǎng)站添加更多功能時，你可以根據(jù)你的業(yè)務(wù)需要擴(kuò)展Yii框架的功能。Yii框架提供了許多工具和類庫，可以幫助你盡可能快地開發(fā)出高效、安全和易于擴(kuò)展的Web應(yīng)用程序。

The above is the detailed content of Create a news website using Yii framework. For more information, please follow other related articles on the PHP Chinese website!