How to use CakePHP3 framework in php?

In recent years, the CakePHP framework has gradually become popular in Web development. It is an efficient and modular framework developed using the PHP programming language. The developers of the CakePHP framework focus on streamlining the development process to make it easier for developers when building web applications. You can develop high-quality web applications faster using the CakePHP3 framework, and it's fairly easy to get started. This article will introduce how to use the CakePHP3 framework.

1. First install the CakePHP3 framework

It is very simple to install the CakePHP3 framework using the Composer command. First, you need to download and install Composer, and then enter the following command in the terminal:

composer create-project --prefer-dist cakephp/app my_app_name

This command will create a new CakePHP3 application in the current directory, and the application name is my_app_name. The directory structure is as follows:

/my_app_name
    /bin
    /config
    /src
    /templates
    /tmp
    /vendor
    /webroot
    composer.json
    composer.lock

If you want to use a database or other dependencies as part of your application, you can configure the composer.json file and run the composer install command in the application directory.

2. Create a sample controller using the CakePHP3 framework

In the CakePHP3 framework, controllers are used to handle requests and responses for web applications. Here is a sample controller code:

namespace AppController;

use CakeControllerController;

class ArticlesController extends Controller
{
    public function index()
    {
        $this->set('articles', $this->Articles->find('all'));
    }

    public function view($id)
    {
        $article = $this->Articles->get($id);
        $this->set(compact('article'));
    }
}

In the above code, ArticlesController is a controller class. The index() method will retrieve all articles from the database and pass them to the view file. The view() method will retrieve a single article and pass it to the view file.

3. Create a sample model using the CakePHP3 framework

In the CakePHP3 framework, models are used to process data for web applications. Here is a sample model code:

namespace AppModelTable;

use CakeORMTable;

class ArticlesTable extends Table
{
    public function initialize(array $config)
    {
        $this->addBehavior('Timestamp');
    }
}

In the above code, ArticlesTable is a model class. It uses ORM (Object Relational Mapping) to store data in a database and attach timestamp behavior to the model. Using an ORM allows you to store data in a database and access the data through objects rather than through SQL queries.

4. Create a sample view using the CakePHP3 framework

In the CakePHP3 framework, views are used to handle the user interface of a web application. Here is a sample view code:

<h2><?= h($article->title) ?></h2>
<p><?= h($article->body) ?></p>

In the above code, the view is written in PHP. It outputs the article title and body text into HTML markup, and uses the built-in escape function h() to ensure that the output content is safe.

5. Connect to Database

The CakePHP3 framework can easily connect to MySQL or other databases. In your application's config/app.php file, you can specify the database connection information. The following is a sample configuration code for MySQL database connection:

'Datasources' => [
    'default' => [
        'className' => 'CakeDatabaseConnection',
        'driver' => 'CakeDatabaseDriverMysql',
        'host' => 'localhost',
        'username' => 'myusername',
        'password' => 'mypassword',
        'database' => 'mydatabase',
        'encoding' => 'utf8mb4',
        'timezone' => 'UTC',
        'cacheMetadata' => true,
    ],
],

6. Run the CakePHP3 application

After installing the CakePHP3 framework, create a sample controller, model and view, and connect to the database After that, you can run your own CakePHP application. You can run your application using the built-in PHP web server or deploy it in a web server such as Apache or Nginx.

Run the built-in PHP web server:

bin/cake server -p 8765

After starting the server, open http://localhost:8765/articles in a web browser to view the article list in the sample controller. Open http://localhost:8765/articles/view/1 to view the details of a single article.

7. Summary

This article introduces how to use the CakePHP3 framework to develop web applications, including installation, creating controllers, models and views, connecting to the database, and running the application. The CakePHP3 framework provides basic functions for building web applications in a modular manner, and plug-ins can also be used to extend the functionality of the framework. It is very simple to start using the CakePHP3 framework. I hope this article will help you.

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