How does php use the ThinkPHP9 framework?

As web applications become more popular in the modern world, development frameworks are becoming more and more popular. Development framework is an effective tool for developers to improve efficiency, reduce errors, improve maintainability and scalability. One such framework is ThinkPHP9, which is a popular PHP framework that is widely used in web applications.

This article will explore how to use the ThinkPHP9 framework, including how to install, configure and use some of its common features.

Install the ThinkPHP9 framework

Using the ThinkPHP9 framework for web application development first requires installing PHP and Composer on your computer. Composer is a PHP dependency manager that simplifies the introduction of third-party libraries.

After installing Composer, please open the command line and enter the following command:

composer create-project topthink/think tp9

In the above command, "topthink/think" refers to a warehouse containing the ThinkPHP9 framework provided by ThinkPHP. tp9 is the project name, you can change it to another name as needed.

After the command is executed, a project named tp9 will be created in the current directory.

Using the ThinkPHP9 framework

After installing the ThinkPHP9 framework, you can create an application. To create an application, open a terminal, switch to the tp9 directory and execute the following command:

php think build -c

This command will create an application named demo in the app directory in the current directory. You can change the name of the application if desired.

Next, you can run the following command to start the built-in web server:

php think run

Visit http://localhost:8000/demo and you will see a welcome page. This indicates that you successfully created and ran a basic application.

Configuration file

When using the ThinkPHP9 framework, you need to configure the database and other parameters. These parameters are usually stored in the config.php file. The following are some important configuration variables:

//数据库配置
return [
    'default' => [
        'type' => 'mysql',
        'hostname' => 'localhost',
        'database' => 'database_name',
        'username' => 'root',
        'password' => '',
        'charset' => 'utf8mb4',
        'prefix' => '',
        'debug' => true,
     ],
];

// 应用配置
return [
    'app_status' => 'dev',
    'app_debug' => true,
    'app_trace' => true,
];

You can find all available configuration files under the config folder, and you can also create your own configuration files and use the config function to load them.

Routing

When using the ThinkPHP9 framework, routing is an important part of realizing the URL function. Routing refers to the process of mapping HTTP requests to corresponding Controllers and Actions.

ThinkPHP9 framework uses annotation routing. You can use annotations to define routes in the Controller, for example:

<?php
namespace appindexcontroller;

use thinknnotationRoute;
use thinkController;

class Index extends Controller {
    /**
     * @Route("/",methods="GET")
     */
    public function index() {
        return view('index');
    }
}

In the above example, we defined a root route and mapped the HTTP GET request Go to the index function of the Index controller. Similarly, you can define more functions with different HTTP methods and routes.

ORM

ORM (Object-Relational Mapping) refers to the mapping between the object model and the relational database. It is a database operation mode.

In the ThinkPHP9 framework, database operations are usually completed using the ORM framework. The ORM framework simplifies the development process by allowing you to manipulate SQL databases by writing object-based code.

The following are some examples of functions that operate the database:

use appdemomodelUser;

// 查询所有用户
$users = User::all();

// 查询单个用户
$user = User::get(1);

// 创建用户
$user = new User();
$user->username = 'admin';
$user->password = md5('admin');
$user->save();

// 更新用户信息
$user = User::get(1);
$user->password = md5('123456');
$user->save();

// 删除用户
$user = User::get(1);
$user->delete();

In the above code, we use the User model to operate the database. You can create and maintain multiple models to manipulate database tables.

Template Engine

In the ThinkPHP9 framework, you can use the built-in template engine to render views. The template engine combines PHP and HTML code to generate the final page. This makes the code more readable and maintainable.

The following is a basic view template:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{$title}</title>
</head>
<body>
    <h1>{$title}</h1>
    <p>{$content}</p>
</body>
</html>

In the above example, we use the {$title} and {$content} variables to output data.

You can use the following code to render the template in the controller:

use thinkacadeView;

View::assign('title', 'Welcome to my website');
View::assign('content', 'This is a demo website.');
return View::fetch('index');

In the above code, we pass the title and content variables to the view and call the fetch method to render the index template.

Conclusion

Using the ThinkPHP9 framework, you can greatly improve development efficiency and create efficient, maintainable and scalable web applications. This article introduces how to install, configure and use some important features in the ThinkPHP9 framework, allowing you to start developing applications faster. Hope this article will be helpful to you.

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