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How to use Phalcon4 framework in php?

王林Original: 2023-06-05 11:51:041342browse

Phalcon4 has just been released. It is a high-performance PHP framework. Its main features include excellent performance, modular structure, powerful dependency injection and rich scalability. This article will introduce how to use the Phalcon4 framework.

Installing Phalcon4

Phalcon4 requires PHP7.2 and above to run properly. To install Phalcon4, you first need to install the Composer package manager. Composer is the most popular package dependency manager for PHP and can easily manage Phalcon4 installation and updates.

You can refer to the official documentation for how to install Composer, so I won’t go into details here.

Once Composer is installed, you can use Composer to install the Phalcon4 framework. Enter the following command in the console:

 composer require phalcon/devtools v4.1.x --dev

where v4.1.x is the Phalcon version you want to install. In this way, Composer will download and install the Phalcon4 framework.

Creating a Phalcon4 application

The Phalcon4 framework provides a command line tool called Phalcon DevTools that can quickly generate the skeleton code of a Phalcon application.

Phalcon DevTools can be installed through the following command:

composer global require phalcon/devtools

After the installation is completed, we can create a new Phalcon4 application through the following command:

phalcon create-project test-project

This command will Create a new application called test-project that contains the infrastructure and files of the Phalcon4 framework.

Configuring Phalcon4 Application

In Phalcon4 application, configuration files are usually stored in the config directory. Among them, the config.php file contains some basic configurations, such as database connection and the base URL of the application.

In addition, Phalcon4 also allows us to use .env files to store sensitive information, such as database login credentials, API keys, etc., to ensure that this information will not be leaked in the code.

Controllers and models using Phalcon4

The Phalcon4 framework uses the MVC pattern, that is, Model-View-Controller.

The core of the MVC model is the controller. The controller is the "brain" of the application, responsible for receiving requests from the user, performing corresponding operations, and ultimately presenting the user with the desired response.

A model is a collection used to communicate with the database. The model represents the basic data structure in the application and corresponds to the table one-to-one. We use models to read, update, create and delete records.

The following is a simple Phalcon4 controller example:

namespace MyAppControllers;

use PhalconMvcController;

class IndexController extends Controller
{
    public function indexAction()
    {
        $this->view->setVar("message", "Hello World!");
    }
}

The above code defines a controller named IndexController and creates an indexAction method. This method is called when the default URL is accessed, passing a message to the view.

Views using Phalcon4

Views are responsible for rendering the output of the application. In Phalcon4, views use the Volt template engine to generate dynamic HTML pages.

The following is a simple Phalcon4 view example:

<!DOCTYPE html>
<html>
    <head>
        <title>Test Application</title>
    </head>
    <body>
        <h1>{{ message }}</h1>
    </body>
</html>

The above code only contains HTML markup, but includes the message we pass in the controller method as a variable.

Using Phalcon4's routing

Phalcon4's router is responsible for mapping application requests to the corresponding controllers and methods.

The following is a simple Phalcon4 routing example:

use PhalconMvcRouter;

$router = new Router();
$router->add(
    "/",
    [
        "controller" => "index",
        "action"     => "index",
    ]
);

In the above code, we define a new router named $router and map the "/" URL to the path named On the "index" controller and the "indexAction" method. This means that when a user visits a base URL (e.g. http://example.com), the controller method will be automatically called and a working response will be returned.

Summary

Phalcon4 is a powerful PHP framework that can bring very good performance and scalability to our applications. By studying this article, you have learned how to use the Phalcon4 framework to create a powerful web application. We believe that this knowledge will make your PHP programming more efficient and fruitful.

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