Phalcon Framework Guide in PHP

Phalcon is an open source project that provides a high-performance framework for PHP developers. The framework is built with C extensions to provide fast running speed and low system resource consumption. This article will introduce some basic concepts and usage methods of the Phalcon framework, so that readers can understand the characteristics and advantages of the framework.

1. Features of the Phalcon framework

The Phalcon framework is built using C language extensions and provides all the functions required in the PHP framework, including routing, template engine, cache, and database Visit etc. It supports multiple view engines, including Volt, PHP, Smarty, etc. In addition, the Phalcon framework also has the following characteristics:

(1) High performance: The Phalcon framework can provide faster speeds than other frameworks because it is an extension written in C language. As a result, the Phalcon framework has faster response times, lower server load, and can handle more concurrent accesses.

(2) Simple and easy to use: The Phalcon framework is written simply and easy to use, and its design concept is to pursue development efficiency. Developers can quickly develop and deploy it online, shortening the development cycle.

(3) Rich components: The Phalcon framework provides a rich set of components, such as Model, View, Form, Security, etc. Developers can quickly integrate or customize the functional components they need.

2. Phalcon framework installation

In order to use the Phalcon framework, you first need to install the Phalcon extension. To install the Phalcon extension, you can follow the following steps:

(1) Download the Phalcon framework source code:

git clone https://github.com/phalcon/phalcon-devtools.git // Clone Source code

(2) Compile and install the Phalcon extension:

cd phalcon-devtools/build
sudo ./install

(3) Add the Phalcon extension to In the php.ini file:

extension=phalcon.so

3. Using the Phalcon framework

The following steps need to be followed to use the Phalcon framework:

(1) Define routing rules

In the Phalcon framework, routing refers to parsing requests and calling corresponding controllers and methods based on specified URI (Uniform Resource Identifier) ​​rules. Routing rules can be defined in the /index.php file. For example:

$di = new PhalconDIFactoryDefault();
$di->setShared('router',function() {

$router = new PhalconMvcRouter();
$router->add('/index/{id:d+}', [
    'controller' => 'index',
    'action'     => 'index'
]);
return $router;

});

In the above code, a routing rule is defined, specifying the controller and method to be called, as well as the parameter values ​​passed to the method.

(2) Define the controller

In the Phalcon framework, the controller refers to the code block that executes business logic, usually corresponding to the route one-to-one. You can define a controller by inheriting PhalconMvcController and write business logic code in it. For example:

class IndexController extends PhalconMvcController {

public function indexAction() {
    $id = $this->dispatcher->getParam('id');
    echo 'Controller Name:Index, Action Name:index, id:'.$id;
}

}

In the above code, a controller named IndexController is defined, which contains a controller named indexAction() Methods.

(3) Define views

In the Phalcon framework, a view refers to the code block responsible for rendering HTML or other types of data. Different view engines can be used to implement view rendering. For example, using the Volt engine can provide faster compilation performance. Multiple views can be defined in the application to render different pages. For example:

$di->setShared('view', function(){

$view = new PhalconMvcView();
$view->registerEngines([
    '.volt' => function($view, $di){
        $volt = new PhalconMvcViewEngineVolt($view, $di);
        return $volt;
    }
]);
return $view;

});

In the above code, a named View is defined The view uses the Volt view engine as the rendering engine.

(4) Define the model

In the Phalcon framework, the model refers to the entity class code block in the application. Model classes can be defined to represent data objects on the website, such as users, products, orders, payments, etc. For example:

use PhalconMvcModel;

class User extends Model{

public $id;
public $name;
public $email;
public $password;

public function getSource() {
    return 'users';
}

}

In the above code, a model class named User is defined , which contains 4 attributes, representing the user's id, name, email and password respectively. A method named getSource() is also defined, which returns the database table name corresponding to the model class. The definitions of other model classes are similar to this.

4. Summary

Through this article, we have learned about the characteristics of the Phalcon framework and its installation method, and introduced the basic process and operation methods of using the Phalcon framework through examples. I believe that by studying this article, readers can use the Phalcon framework for project development more quickly and efficiently.

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