PHP Implementation Framework: Laravel Getting Started Tutorial-PHP Tutorial-php.cn

PHP Implementation Framework: Laravel Getting Started Tutorial

王林

Release： 2023-06-18 14:36:01

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With the rapid development of the Internet, more and more websites have emerged. In order to develop more efficient and reliable websites, various programming languages and frameworks have emerged. Among them, PHP, as a very mature programming language, plays an important role in website development. Among PHP frameworks, Laravel is also one of the most popular frameworks. Therefore, learning Laravel has become a required course for many developers. This article will introduce you to the Laravel introductory tutorial to help you start using Laravel to develop web applications.

1. Introduction to Laravel Framework

Laravel is an open source PHP web application framework created by Taylor Otwell in 2011. Its emergence provides a new way for PHP application development, which can help developers write safe, reliable, and elegant Web applications more efficiently. Laravel's goal is to build ease of use, clear, elegant syntax and native out-of-the-box functionality. It has complete documentation and lots of community support, and is one of the preferred frameworks for building various web applications.

2. Laravel Framework Installation

Before learning Laravel, you first need to install the Laravel framework. Here is a method to install using Composer.

Install Composer

Composer is a dependency manager for PHP that allows you to declare dependencies in your project and use these dependencies. Before installing Laravel, we need to install Composer first.

Composer can be installed in the terminal through the following command:

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php composer-setup.php
php -r "unlink('composer-setup.php');"

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After the installation is complete, we can use composer in the command line.

You can use the following command to create a new Laravel project in the root directory:

composer create-project --prefer-dist laravel/laravel blog

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After completion, a folder named "blog" will appear in the root directory. This will be the root directory of your new Laravel application.

3. Create the first route

In the Laravel framework, routing is a method used to define the request methods accepted by the web application (such as GET, POST, etc.) and the corresponding operations of the guide. Way. In Laravel, we can define routes through the Route class.

Here's how to create a Laravel route:

Add the following code in the routes/web.php file:

Route::get('/hello', function() {
    return "Hello World";
});

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Connect Down, you can run the following command to start the built-in PHP development server:

php artisan serve

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After running, you can visit http://localhost:8000/hello in the browser and you can see "Hello World "Output.

4. Using views

In Laravel, we can use the view view to render the template. Views provide a way to render templates and insert data, so that raw HTML can be prepared on the server side and then sent to the client. The Laravel framework uses the Blade template engine, which allows you to create beautiful templates in a simple way.

Create a controller file called HelloController.php in the app/Http/Controllers directory and add the following content:

<?php

namespace AppHttpControllers;

use IlluminateHttpRequest;

class HelloController extends Controller
{
    public function index()
    {
        $name = "Laravel";
        return view('hello', ['name' => $name]);
    }
}

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Next, You can create a Blade template file named hello.blade.php in the resources/views directory and add the following content:

<!DOCTYPE html>
<html>
<head>
    <title>Hello</title>
</head>
<body>
    <h1>Hello {{ $name }}</h1>
</body>
</html>

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Next, you can add the following content in the routes/web.php file Add the following content:

Route::get('/hello', 'AppHttpControllersHelloController@index');

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Then visit http://localhost:8000/hello, you can see the output of "Hello Laravel" in the browser.

5. Connect to the database

In the Laravel framework, connecting to the database is very simple. First, a new database needs to be created. A database can be created using phpMyAdmin or other database tools. Next, you need to set the database connection parameters in your Laravel application's .env file.

Open the .env file and edit the following content:

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=your_database_name
DB_USERNAME=your_database_user
DB_PASSWORD=your_database_password

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Next, you can use Laravel’s query builder to execute the query.

Create a controller file named UserController.php in the app/Http/Controllers directory and add the following content:

<?php

namespace AppHttpControllers;

use IlluminateHttpRequest;
use IlluminateSupportFacadesDB;

class UserController extends Controller
{
    public function index()
    {
        $users = DB::table('users')->get();

        return view('users.index', ['users' => $users]);
    }
}

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Next, in resources/ Create a Blade template file named users/index.blade.php in the views directory and add the following content:

<!DOCTYPE html>
<html>
<head>
    <title>Users</title>
</head>
<body>
    <ul>
        @foreach ($users as $user)
            <li>{{ $user->name }}</li>
        @endforeach
    </ul>
</body>
</html>

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Next, add the following to the routes/web.php file Content:

Route::get('/users', 'AppHttpControllersUserController@index');

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Then you can visit http://localhost:8000/users in the browser and you can see the user list retrieved from the database.

6. Conclusion

This article introduces the introductory tutorial of Laravel, and details the installation of the Laravel framework, creating routes, using views, and connecting to the database. Through studying this article, I believe that everyone has a certain understanding and mastery. Finally, I hope readers will learn and explore Laravel more deeply and further improve their skills and level in the field of web application development.

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