What are the implementation methods of routing technology in PHP7.0?

What are the implementation methods of routing technology in PHP7.0?

As web applications become more and more complex, routing technology is becoming more and more important in web development. Routing technology is a core part of web application design, it is the bridge between visitor requests and applications. So learning routing technology is very important for web developers. This article will introduce the routing technology in PHP7.0 and its implementation.

1. What is routing technology?

Routing technology refers to the process of mapping HTTP request addresses (URL) to specific handlers or controllers. The development of the Internet industry has placed higher and higher requirements on Web applications, and people's standards for website performance and page loading speed are also constantly improving. To do this, web applications need to reduce response times, server load, and communication bandwidth as much as possible. Routing technology exists for this purpose.

In web applications, the role of routing technology can be simply summarized as forwarding client requests to a handler or controller on the server side, while passing parameters to the handler or controller for processing. The purpose of routing technology is to make web applications more flexible, improve response speed and user experience.

2. Routing technology implementation in PHP7.0

1. Routing technology based on GET parameters

GET parameter routing technology is the most basic routing technology and the most Common routing technologies. In this method, the requested URL contains GET parameters to specify the name of the handler or controller and the processing parameters. This method usually uses official documents or API documents to define parameters and processing methods to facilitate processing by the program.

For example, the following URL request:

http://www.example.com/index.php?controller=home&action=index&id=1

Among them, controller represents the controller to be used, action represents the method to be processed, and id represents the parameters passed to the handler. In PHP, the handler can implement routing technology in this way:

$controller = $_GET['controller'];
$action = $_GET['action'];
$id = $_GET['id'];

$controller = new $controller();
$controller->{$action}($id);

Dynamic instantiation is used here to create a controller instance, and then calls the corresponding method in the controller.

2. Routing technology based on PATH_INFO

Based on the routing technology based on GET parameters, in order to make the URL more standardized and readable, routing technology based on PATH_INFO can be used. In this way, GET parameters are no longer used in the URL, but the parameters are encoded into the URL, for example:

http://www.example.com/index.php/home/index/1

In PHP, the path information can be obtained by parsing $_SERVER['PATH_INFO'] , and use corresponding processing programs or controllers for processing. Routers often use regular expressions to parse parameters in URLs for expired route matching.

3. File system-based routing technology

File system-based routing technology is a common routing technology that uses the path in the URL to map files on the file system. In the file system, you can create a set of PHP files containing request handlers or controllers, and then map each handler or controller by the path in the URL.

For example, you can map the path in the URL:

http://www.example.com/index.php/home/index

to a file in the file system:

/home/index.php

This file contains the processor code. In PHP, it can be implemented like this:

$url = ltrim($_SERVER['REQUEST_URI'], '/');
$parts = explode('/', $url);

$controller = $parts[0];
$action = isset($parts[1]) ? $parts[1] : 'index';

$filename = $controller . '.php';
if (file_exists($filename)) {
    require_once($filename);

    $controller = new $controller();
    $controller->{$action}();
}

Here, first obtain the information of the path in the URL, and then parse the controllers and operations contained in the path. Finally, the corresponding controllers and operations are mapped through the file system.

4. Routing technology based on RESTful API

RESTful API is a style of Web API that defines a set of specifications for communicating with Web services. RESTful API can provide web service-based functions through HTTP protocol. This technology usually uses HTTP methods GET, POST, PUT and DELETE to read, create, modify and delete data.

In PHP, you can use RESTful API to implement routing technology. The specific implementation method is as follows:

switch ($_SERVER['REQUEST_METHOD']) {
    case 'GET':
        // 处理GET请求
        break;
    case 'POST':
        // 处理POST请求
        break;
    case 'PUT':
        // 处理PUT请求
        break;
    case 'DELETE':
        // 处理DELETE请求
        break;
}

Here, use the HTTP method to parse the request type and use the corresponding handler or controller to parse the request data.

In short, routing technology is very important for Web developers. PHP7.0 provides various implementation methods to implement routing technology. Developers can choose the corresponding implementation method according to the needs of the application.

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