slim is a lightweight micro-PHP framework that can help PHP developers quickly write simple but powerful RESTful web applications and APIs. Features of the Slim framework: 1. Provides a fast and powerful router that can map routing callbacks to specific HTTP request methods and URIs; 2. Build applications with concentric middleware to adjust HTTP requests and Response object; 3. Supports dependency injection; 4. Supports any PSR-7 HTTP message implementation; 5. Simple configuration.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

What is Slim?

Slim is a PHP-based web development micro-framework that helps PHP developers quickly write simple and powerful web applications and APIs. Slim's interface is simple and intuitive, and the documentation is very detailed.

slim is a simple yet powerful PHP5 framework that can be used to create RESTful web applications. You can use the slim framework to design a simplified version of the yeelink platform. The RESTFul architecture is very important to the Internet of Things. Learning Slim also deepens your understanding of the RESTFul framework and related technologies.

Let’s look at a piece of code directly:

$app->get('/', function () use ($app) {
  var_dump($app);
});

Is it a bit like jQuery? In fact, the author of Slim is a PHP and JavaScript programmer, and is also the author of "PHP The Right Way"

Features

• Powerful HTTP URL Routing

  Slim provides a fast and powerful router that maps routing callbacks to specific HTTP request methods and URIs. It supports parameter and pattern matching.

• Middleware

  Build applications using concentric middleware to align HTTP request and response objects around your Slim application.

• PSR-7 Support

  Slim supports any PSR-7 HTTP message implementation, so you can inspect and manipulate HTTP message methods, status, URIs, headers, cookies and text.

• Dependency Injection

  Slim supports dependency injection so you have full control over external tools. Use any Container-Interop container.

• Simple configuration

• Custom view

• Support AES-256 encrypted cookies

• HTTP Cache

• Customizable Logging

• Error Handling

• Scalable middle tier and hook architecture

• Error handling and debugging

How Slim works of?

First, you need a web server like Nginx or Apache. You should configure your web server so that all appropriate requests are sent to a "front controller" PHP file. You instantiate and run the Slim application in this PHP file.

Slim applications contain routes that respond to specific HTTP requests. Each route invokes a callback and returns an HTTP response. First, you instantiate and configure your Slim application. Next, define application routes. Finally, run the Slim application. It's that simple.

Installation

Use Composer to install

First install Composer in your project:

curl -s https://getcomposer.org/installer | php

Then create a file named composer.json in your project root directory:

{
    "require": {
        "slim/slim": "2.*"
    }
}

Install through composer:

php composer.phar install

Add the following code to the application's index.php file:

<?php
require &#39;vendor/autoload.php&#39;;

System dependencies

• PHP 5.3.0 or above

• If you need to encrypt cookies, you also need the mcrypt extension.

Hello World

Generate a Slim application instance, define routes, and run the application:

$app = new \Slim\Slim();
$app->get('/hello/:name', function($name){
                echo "Hello, $name";
            });
$app->run();

Configuration

The Slim framework provides two ways to configure it. One is to set parameters when generating an instance, and the other is to set parameters after generating an instance. All setting parameters can be passed to the Slim constructor in the form of an array when creating an instance. All setting parameters can be obtained or modified after generating the instance, but some settings cannot simply rely on the config function of the application instance, so additional explanations are necessary later. Before I list the valid settings, I want to briefly explain how to define or check the settings of a Slim application.

When the instance is generated

To define the settings when generating the instance, you only need to pass an associative array to Slim's constructor.

$app = new Slim(array(
    'debug' => true
));

After the instance is generated

To define parameter settings after the instance is generated, most settings can be made using the config function of the application instance; the first parameter of the config function is the name of the setting, and the second parameter is the parameter value of the setting.

$app->config('debug', false);

Set multiple parameters at the same time:

$app->config(array(
                'debug' => true,
                'templates.path' => ' ../templates'
                ));

Get a certain application setting:

$settingValue = $app->config('templates.path'); // 返回 "../templates"

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of What does slim mean in php?. For more information, please follow other related articles on the PHP Chinese website!