Examples to explain how to build a small Web project using ThinkPHP

ThinkPHP is a very popular PHP framework that can easily build a stable web application. This article will introduce how to use the ThinkPHP framework to build a small Web project.

1. Environment preparation

Before you start using ThinkPHP, you need to ensure that the PHP running environment has been set up and Composer has been installed. Composer is a tool for PHP package management. It can help us quickly download and install the libraries and dependency packages we want to use.

2. Create a project

Use Composer to create a project:

Enter the following command in the command line:

composer create-project topthink/think tp5

This will be created in the current directory A folder named tp5, which is our project root directory.

3. Configure the database

When using the ThinkPHP framework, you need to configure the database parameters so that the framework can access the database. Find the file application/database.php in the project root directory and find the following code block:

    'database'        => 'test',    // 数据库名
    'username'        => 'root',    // 用户名
    'password'        => '',        // 密码

Change the database name, username and password here to your own.

4. Create controllers and models

Using the ThinkPHP framework requires following the MVC (Model-View-Controller) design pattern. We need to first create a controller to obtain and check the required data, then pass the data to the model for database operations, and finally pass the data to the view for display.

Find the folder application/index/controller in the project root directory, create a file named Index.php, and enter the following code:

namespace app\index\controller;

use think\Controller;
use app\index\model\User;

class Index extends Controller
{
    public function index()
    {
        $User = new User();
        $Users = $User->getAllUsers();
        $this->assign('Users', $Users);
        return $this->fetch();
    }
}

The above code snippet first defines a controller class named Index, which inherits from the ThinkPHP basic controller class Controller. A index() method is defined in this class, which first creates a new User model object, and then calls User’s getAllUsers() Method to obtain all user information and assign it to the view.

Next, we need to create another model to perform database operations. Find the folder application/index/model in the project root directory, create a file named User.php, and enter the following code:

namespace app\index\model;

use think\Model;

class User extends Model
{
    public function getAllUsers()
    {
        return $this->select();
    }
}

The above code The fragment first defines a model class named User, which inherits from the ThinkPHP base model class Model. A getAllUsers() method is defined in this class, which uses the select() method to obtain information about all users and return query results.

5. Test Project

After the above steps are completed, we can test whether the project can run correctly. Go to the project root directory on the command line and enter the following command:

php think run

This command allows us to start the local server and access the project homepage in the browser. Enter the browser and enter the following URL:

http://localhost:8000/

If everything is correct, you should be able to see the homepage of the project, and the page displays all the user information stored in your database.

This article is just a brief introduction to the use of the ThinkPHP framework. It has many other advanced usages and in-depth applications. I hope that by studying this article, readers can understand and get help from using the ThinkPHP framework.

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