As an open source scripting language, PHP is widely used due to its portability, cross-platform, concise and easy-to-read code, fast development speed, and strong scalability. In PHP, using frameworks can make it easier to organize code, improve code quality and development efficiency. Phalcon5 is an excellent framework in PHP. This article will introduce how to use the Phalcon5 framework for web development.

1. Install the Phalcon5 framework

Before you start using the Phalcon5 framework, you need to install it first. The Phalcon5 framework includes two parts: PHP extension and PHP code. Let's install the PHP extension part first.

1. Download Phalcon5 source code

You can download the Phalcon5 source code from the Phalcon official website, or download the Phalcon5 source code from GitHub. Unzip it after the download is complete.

2. Installing dependent libraries

Before installing Phalcon5, you need to install some dependent libraries, including php-devel, pcre-devel and gcc. The specific installation commands are as follows:

yum install php-devel
yum install pcre-devel
yum install gcc

3. Compile and install Phalcon5

After installing the dependent libraries, enter the Phalcon5 source code directory and execute the following command:

cd /path/to/phalcon5/source
phpize
./configure
make && make install

After performing the above steps, the Phalcon5 extension will be installed in the PHP extension directory. Then add the following configuration to the php.ini file:

extension=phalcon.so

Restart the web server to complete the installation of the Phalcon5 extension.

2. Create Phalcon5 project

The Phalcon5 framework provides a tool for quickly creating projects, Phalcon CLI. Execute the following command in the terminal to use Phalcon CLI:

phalcon create-project myproject

The above command will create a Phalcon5 project named myproject, which contains the default directory structure and sample code of the Phalcon5 framework.

3. Understand the directory structure of the Phalcon5 framework

The directory structure of the Phalcon5 framework is as follows:

myproject/
    app/
        config/
            config.php
        controllers/
            IndexController.php
        models/
            Users.php
        views/
            index.phtml
    public/
        index.php
    vendor/
    .htaccess
    config.php

Among them, myproject is the root directory of the application, and the app directory is the core code directory of the application. , the public directory is the entry directory of the application.

4. Writing a Phalcon5 application

Let’s write a simple Phalcon5 application that will display a list of all users.

1. Create database table

First, we need to create a table named users in the database, which contains three fields: id, name and age. The table can be created using the following SQL statement:

CREATE TABLE `users` (
  `id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(50) NOT NULL,
  `age` INT(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=INNODB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

2. Writing Controller

Create a file named UserController.php in the app/controllers directory with the following content:

<?php
use PhalconMvcController;

class UserController extends Controller
{
    public function indexAction()
    {
        $users = Users::find();
        $this->view->users = $users;
    }
}

UserController is a controller, where indexAction is an action. This action uses the ORM mechanism provided by Phalcon5 to obtain all user information and pass this information to the view.

3. Write the model

Create a file named Users.php in the app/models directory with the following content:

<?php
use PhalconMvcModel;

class Users extends Model
{
    public $id;
    public $name;
    public $age;
}

Users is a model Class, which defines the structure of the users table in the database. The Phalcon5 framework will map database tables based on this model class.

4. Writing Views

Create a file named user/index.phtml in the app/views directory with the following content:

<!DOCTYPE html>
<html>
<head>
    <title>Users List</title>
</head>
<body>
<table>
    <thead>
        <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Age</th>
        </tr>
    </thead>
    <tbody>
        <?php foreach ($users as $user) { ?>
        <tr>
            <td><?php echo $user->id; ?></td>
            <td><?php echo $user->name; ?></td>
            <td><?php echo $user->age; ?></td>
        </tr>
        <?php } ?>
    </tbody>
</table>
</body>
</html>

index. phtml is a view file used to display a list of all users. This view file uses PHP's foreach loop to loop through all user information and display the information in a table.

5. Set routing

Set routing in the config/routes.php file:

<?php
use PhalconMvcRouter;

$router = new Router(false);
$router->add('/', array(
    'controller' => 'user',
    'action' => 'index'
));
$router->handle();

This route will access the indexAction method of UserController by default.

6. Run the application

Enter the myproject/public directory in the terminal and execute the following command:

php -S localhost:8000

Then visit http:// in the browser /localhost:8000/, you can see the application running results.

5. Summary

This article introduces how to install and use the Phalcon5 framework for Web development. The Phalcon5 framework has the advantages of high performance and high efficiency, and has broad application prospects in Web development. I hope readers will understand the Phalcon5 framework through this article and use it in practical applications.

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