How to use Phalcon framework in PHP programming?-PHP Tutorial-php.cn

How to use Phalcon framework in PHP programming?

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Release： 2023-06-12 13:28:02

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As web development continues to develop, various frameworks are constantly emerging, and among these frameworks, the Phalcon framework is considered to be one of the fastest PHP frameworks. It is a high-performance PHP framework written using C extensions, which is modular, has low coupling and high scalability. In this article, we will introduce step by step how to use Phalcon framework in PHP programming.

Step One: Install the Phalcon Framework

Like other PHP extensions, Phalcon needs to be installed on PHP in binary form to work. However, Phalcon has one unique feature: it contains many extensions that need to be loaded into PHP in order.

How to install Phalcon framework? Phalcon source code must be downloaded and compiled manually. First, you need to check whether the server meets the following requirements:

PHP version 5.5 or higher
PHP source code and header files
GCC or Clang compiler
And other necessary software packages

Then follow these steps:

Download the Phalcon source code. It is recommended to download the latest version of Phalcon from GitHub.
Unzip and enter the source code directory:

tar -xf phalcon.tar.gz
cd phalcon/build

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Compile the source code:

sudo ./install

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Add the Phalcon extension Go to the PHP.ini file:

extension=phalcon.so

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Then, restart the PHP service. If everything goes well, the Phalcon framework has been installed!

Step 2: Create a Phalcon project

The Phalcon framework provides a CLI tool called Phalcon-devtools that can help us create and manage Phalcon projects. Execute the following command to install Phalcon-devtools:

composer require phalcon/devtools

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Next, you can create a new Phalcon project using Phalcon-devtools by running the following command:

vendor/bin/phalcon create-project hello

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This will create a project named "hello" Phalcon project and generate the following directory structure:

hello/
├── app
│   ├── config
│   │   ├── config.php
│   │   ├── loader.php
│   │   ├── routes.php
│   ├── controllers
│   │   ├── IndexController.php
│   ├── views
│   ├── Bootstrap.php
├── public
│   ├── index.php

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Now we have a Phalcon project and can access it in the browser. Please start the PHP built-in web server to view our Phalcon project:

cd hello/public
php -S 127.0.0.1:8080

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Open your browser and visit http://localhost:8080/, you will see "Hello, congratulations! You're now flying with Phalcon." " news. Congratulations, we have successfully created the Phalcon project!

Step 3: Use Phalcon MVC pattern

Phalcon is a framework that supports the MVC pattern, which is a common Web development pattern. In the Phalcon project, all controller, model and view files need to be placed in the app directory.

In the controller folder, you can add the following code in the IndexController.php file:

<?php

class IndexController extends PhalconMvcController
{
    public function indexAction()
    {
        $this->view->setVar('message', 'Hello from IndexController!');
    }
}

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This code defines an IndexController, which contains an indexAction function. This function will set a variable called "message" via the $this->view object, which will be used in the view file.

Now, we need to create a view file to display the message. In the views folder, create a file called index.volt and add the following code to it:

<!DOCTYPE html>
<html>
    <head>
        <title>Phalcon Project</title>
    </head>
    <body>
        <div><?php echo $message ?></div>
    </body>
</html>

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This will display a simple HTML page with the content of the "message" variable.

Now go to http://localhost:8080/ in the browser, and you will see the Web page with the message "Hello from IndexController!" Congratulations, we have successfully created an MVC application using the Phalcon framework!

Step 4: Use Phalcon Query Builder

Phalcon provides a variety of ORM and ODM solutions, of which query builder is one of them. Query builder allows us to build database queries through object-oriented API without knowing SQL. In Phalcon's query builder, each table is a model.

Suppose we have a table named "users" which contains the following fields: id, name, email, password. We can use the following code to get all "users" from the database:

$users = Users::find();

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This will return a PhalconMvcModelResultset object containing all users. If we want to get the user based on name, we can use the following code:

$user = Users::findFirstByName('John');

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This will return an object containing the user with the name "John".

Step 5: Use the Phalcon Router

The router is an important part of any web framework. Phalcon provides a flexible router that allows us to define complex routing rules. The router is very flexible and supports routing parameters, template matching, and even regular expressions.

Here is a simple example to demonstrate how to define routes in the Phalcon framework:

$router = $di->getRouter();

$router->add(
    "/users/edit/{id:[0-9]+}",
    [
        'controller' => 'users',
        'action'     => 'edit',
    ]
);

$router->handle();

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This code will define a route on the "/users/edit/{id}" path. When the router matches this path, it calls the "edit" function in the "users" controller and passes the route parameter "id" to this function.

Conclusion

At this point, we have learned how to use the Phalcon framework in PHP programming. Phalcon framework is a very fast framework, so if you need to handle large amounts of data in your project, then it may be the best choice for you. Start using the Phalcon framework!

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