How to use Phalcon framework in php?

The Phalcon framework is a PHP framework based on C extensions, which has faster speed and lower memory footprint than other PHP frameworks. In this article, we will introduce how to use Phalcon framework in PHP.

1. Install the Phalcon framework

Before using the Phalcon framework, we need to ensure that the Phalcon extension has been installed. If it has not been installed, please follow the steps below to install it:

1) Go to Phalcon official website (https://phalconphp.com/en/download) to download the Phalcon extension. Please make sure that the extension version you download corresponds to your PHP version.

2) Unzip the Phalcon expansion file.

3) Enter the Phalcon extension directory and execute the following command:

sudo ./install

4) Modify the php.ini file and add the following content:

extension=phalcon.so

Note: Since Phalcon is a C extended PHP framework, so you need to install the PHP development environment and compiler first. If it is not installed on your system, please install it first.

2. Create a Phalcon project

After installing the Phalcon extension, we can start creating the Phalcon project. Phalcon provides a command line tool - Phalcon Developer Tools, through which we can easily create and manage our Phalcon projects.

1) Open the terminal and execute the following command to install Phalcon Developer Tools:

composer require phalcon/devtools

2) Add Phalcon Developer Tools to the system environment variable:

export PATH=$PATH:./vendor/bin

3) Use Phalcon The Developer Tools command creates a new Phalcon project:

phalcon create-project myproject

where myproject is the project name.

After the creation is completed, we will see a message in the command line: "Congratulations! You have successfully created your Phalcon project." This means that our Phalcon project has been successfully created.

3. Familiar with the directory structure of the Phalcon framework

After mastering the basic knowledge of the Phalcon framework, we need to understand the directory structure of the Phalcon framework. Phalcon's project directory structure is as follows:

myproject/
├── app/
│   ├── config/
│   ├── controllers/
│   ├── models/
│   └── views/
├── public/
├── vendor/
├── .phalcon/
├── app.php
└── README.md

Among them, the app directory is the core of the project, including configuration, controller, model and view files, the public directory contains the entry files of the project, and the vendor directory contains the project all dependent packages. The .phalcon directory is used to record the configuration information of Phalcon Developer Tools.

4. Write a simple Phalcon controller

The Phalcon controller is used to process requests and return corresponding responses. Below we will write a simple Phalcon controller to illustrate how to use the Phalcon framework.

In the myproject/app/controllers directory, create a file named IndexController.php and add the following code:

<?php

use PhalconMvcController;

class IndexController extends Controller
{
    public function indexAction()
    {
        echo "Hello, Phalcon!";
    }
}

In the above code, we define a file named IndexController controller and added an action method named indexAction in the controller. In the indexAction method, we output a message.

5. Configuring Phalcon project routing

Phalcon’s router is used to distribute requests to the corresponding controller. Next we will add routing to our Phalcon project.

In the myproject/app/config directory, create a file named routes.php and add the following code:

<?php

use PhalconMvcRouter;

$router = new Router();

$router->add(
    '/',
    [
        'controller' => 'Index',
        'action'     => 'index'
    ]
);

return $router;

In the above code, we use Phalcon’s router to add a The route named "/" distributes the request to the indexAction action method of the controller named Index.

6. Configure the entry file of the Phalcon project

In the myproject/public directory, create a file named index.php and add the following code:

<?php

use PhalconMvcApplication;
use PhalconConfigAdapterIni as ConfigIni;
use PhalconLoader;

define('APP_PATH', realpath('..') . '/app');

require_once APP_PATH . '/config/routes.php';

$loader = new Loader();

$loader->registerDirs(
    [
        APP_PATH . '/controllers/',
        APP_PATH . '/models/',
    ]
);

$loader->register();

$config = new ConfigIni(APP_PATH . '/config/config.ini');

$application = new Application($config);

echo $application->handle()->getContent();

In the above code, we use Phalcon's Application class to create an application and add the routing configuration file and controller and model loader to the application.

7. Run the Phalcon project

We can use the following command to start our Phalcon project:

php -S localhost:8000 -t public

Enter http:// in the browser localhost:8000, you will see "Hello, Phalcon!" output. This shows that our Phalcon project has been successfully run.

Summary

The Phalcon framework is a high-speed, low resource consumption PHP framework. By studying this article, you have learned how to use the Phalcon framework in PHP. In actual development, you can have a deeper understanding and application of the Phalcon framework based on your needs and business scenarios, thereby improving your development efficiency and project performance.

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