How to use Yii5 framework in php?-PHP Tutorial-php.cn

How to use Yii5 framework in php?

王林

Release： 2023-06-01 13:42:01

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Yii5 is an efficient, fast and secure web development framework and is the latest version of the Yii framework. Compared with previous versions, Yii5 has better performance and more advanced features, thus attracting the attention and use of more and more PHP developers.

This article will introduce how to use the Yii5 framework for web development.

First of all, assuming you have installed PHP and Composer, then we can start using Yii5.

1. Install the Yii5 framework

It is very simple to install the Yii5 framework using Composer. You only need to execute the following command in the terminal:

composer create-project yiisoft/yii-project myproject

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Among them, myproject is the one you want to create project name. After executing this command, Composer will automatically download the framework files and its dependent libraries from the official Yii5 repository and install them automatically.

After the installation is complete, you will see a folder named myproject, which is your Yii5 project directory.

2. Configure the database

Yii5 uses the MySQL database by default, so before starting development, we need to configure the database connection first. In the myproject/config directory, open the db.php file and modify the following code:

return [
    'dsn' => 'mysql:host=localhost;dbname=mydatabase',
    'username' => 'myusername',
    'password' => 'mypassword',
    'charset' => 'utf8mb4',
];

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Among them, dsn represents the data source name, modify it to your MySQL server address and database name, username and password represent your MySQL user name and password.

3. Create controllers and views

In Yii5, controllers are used to process user requests and return corresponding response results, and views are used to present these response results.

First, we need to create a controller. In the myproject/src/controllers directory, create a PHP file named SiteController, containing the following code:

namespace appcontrollers;

use yiiwebController;

class SiteController extends Controller
{
    public function actionIndex()
    {
        return $this->render('index');
    }
}

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Among them, namespace represents the namespace, here is appcontrollers, which is the namespace where the controller is located. use indicates that a class named Controller is referenced.

actionIndex is the operation we want to perform. This operation will return a view named index.

Next, we create a PHP file named index.php in the myproject/src/views/site directory, containing the following code:

<?php $this->beginPage() ?>
<!DOCTYPE html>
<html>
<head>
    <title>Hello World</title>
    <?php $this->head() ?>
</head>
<body>
<?php $this->beginBody() ?>

<h1>Hello World</h1>

<?php $this->endBody() ?>
</body>
</html>
<?php $this->endPage() ?>

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This code will display a Text titled "Hello World".

4. Start the server

Finally, we need to start the built-in web server of Yii5. In the terminal, enter the myproject directory and execute the following command:

./yii serve

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After execution, you will see the following output:

Yii Console Tool (1.0.0)

This is Yii version 3.0.0.

... ...

Starting server on http://localhost:8080

Quit the server with CTRL-C

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indicates that the server has been started and access http://localhost: 8080 to view your first Yii5 web page.

Summary

This article introduces how to use the Yii5 framework for web development, including steps such as installing the framework, configuring the database, creating controllers and views, and starting the server.

It should be noted that the Yii5 framework is a high-performance and fast framework, but you also need to learn and master some Yii5 features and usage. Therefore, before using the Yii5 framework for web development, it is recommended to read its official documentation and tutorials to better understand and master the use of Yii5.

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