How to implement a PHP framework yourself?

How to implement a PHP framework yourself?

With the rapid development of the Internet, PHP, as a powerful programming language, is widely used in the field of Web development. The emergence of the PHP framework has greatly simplified the development process and improved development efficiency. This article will introduce how to implement a simple PHP framework by yourself.

1. Build the infrastructure

First, we need to build the infrastructure of the framework. Create the following folders and files in the project root directory:

• app: to store the application business logic code
• config: to store Configuration file
• public: serves as the entrance to Web access
• vendor: stores third-party dependent libraries

in Create the index.php file in the public folder as the entry file of the project. In index.php, we need to define constants and introduce initialization files, as shown below:

<?php
define('ROOT_PATH', dirname(__DIR__));
define('APP_PATH', ROOT_PATH . '/app');

require_once ROOT_PATH . '/vendor/autoload.php';
require_once APP_PATH . '/init.php';

2. Implement routing function

In## Create a routes.php file in the #app folder to define routing rules. In routes.php, we can define the controllers and actions corresponding to each URL path, as shown below:

<?php
return [
    '/' => 'HomeController@index',
    '/about' => 'PageController@about',
    '/contact' => 'PageController@contact',
];

Next, under the

app folder Create the Router.php file to implement the routing function. In Router.php, we can parse the URL path, find the corresponding controller and action, and execute them as follows:

<?php
class Router
{
    protected $routes = [];

    public function loadRoutes($file)
    {
        $this->routes = require $file;
    }

    public function dispatch($uri)
    {
        if (array_key_exists($uri, $this->routes)) {
            $this->callAction(...explode('@', $this->routes[$uri]));
        } else {
            // 处理404页面
        }
    }

    protected function callAction($controller, $action)
    {
        require_once APP_PATH . '/controllers/' . $controller . '.php';
        $controller = new $controller();
        if (method_exists($controller, $action)) {
            $controller->$action();
        } else {
            // 处理方法不存在的情况
        }
    }
}

In

init.phpIn the file, we need to initialize the route and distribute the request as follows:

<?php
$router = new Router();
$router->loadRoutes(APP_PATH . '/routes.php');
$router->dispatch($_SERVER['REQUEST_URI']);

Implement the controller and view

In the

app file Create a controllers folder under the folder to store controller files. In the controller file, we can define the logical processing of each action, as follows:

<?php
class HomeController
{
    public function index()
    {
        // 处理首页逻辑
    }
}

class PageController
{
    public function about()
    {
        // 处理关于我们页面逻辑
    }

    public function contact()
    {
        // 处理联系我们页面逻辑
    }
}

Create the

views folder under the app folder for Store view files. In the view file, we can write HTML and PHP code for displaying data and interactive interfaces.

Implement model and database operations (optional)

If we need to interact with the database, we can create a

models folder to store model files . In the model file, we can define the data model corresponding to the database table and the corresponding database operations.

Implement other commonly used components (optional)

According to actual needs, we can also implement other commonly used components, such as form verification, file upload, cache, log, etc. .

At this point, we have completed the implementation of a simple PHP framework. By implementing the PHP framework ourselves, we can have a deeper understanding of the working principle of the framework and improve our programming abilities. Of course, this is just a simple example, a complete PHP framework will contain more functions and components. I hope this article will be helpful to your study and practice.

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